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Finding the Fourth Proportional to 546,919.40, 820,379.10 and 520,675.40

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Solution

The fourth proportional to 546,919.40, 820,379.10 and 520,675.40 is: 781,013.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    546,919.40 : 820,379.10 = 520,675.40 : x
  2. Step 2: Convert to fraction form
    546,919.40/820,379.10 = 520,675.40/x
  3. Step 3: Cross multiply
    546,919.40x = 820,379.10 × 520,675.40
  4. Step 4: Simplify right side
    546,919.40x = 427,151,216,044.14
  5. Step 5: Solve for x
    x = 427,151,216,044.14/546,919.40
  6. Step 6: Final answer
    x = 781,013.10

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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.