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Finding the Fourth Proportional to 617,522.40, 865,231.20 and 617,522.40

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Solution

The fourth proportional to 617,522.40, 865,231.20 and 617,522.40 is: 865,231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,522.40 : 865,231.20 = 617,522.40 : x
  2. Step 2: Convert to fraction form
    617,522.40/865,231.20 = 617,522.40/x
  3. Step 3: Cross multiply
    617,522.40x = 865,231.20 × 617,522.40
  4. Step 4: Simplify right side
    617,522.40x = 534,299,647,178.88
  5. Step 5: Solve for x
    x = 534,299,647,178.88/617,522.40
  6. Step 6: Final answer
    x = 865,231.20

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.