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Finding the Fourth Proportional to 576,783.60, 865,175.40 and 340,393.20

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Solution

The fourth proportional to 576,783.60, 865,175.40 and 340,393.20 is: 510,589.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,783.60 : 865,175.40 = 340,393.20 : x
  2. Step 2: Convert to fraction form
    576,783.60/865,175.40 = 340,393.20/x
  3. Step 3: Cross multiply
    576,783.60x = 865,175.40 × 340,393.20
  4. Step 4: Simplify right side
    576,783.60x = 294,499,822,967.28
  5. Step 5: Solve for x
    x = 294,499,822,967.28/576,783.60
  6. Step 6: Final answer
    x = 510,589.80

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.