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Finding the Fourth Proportional to 520,001.70, 780,002.55 and 436,020.90

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Solution

The fourth proportional to 520,001.70, 780,002.55 and 436,020.90 is: 654,031.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,001.70 : 780,002.55 = 436,020.90 : x
  2. Step 2: Convert to fraction form
    520,001.70/780,002.55 = 436,020.90/x
  3. Step 3: Cross multiply
    520,001.70x = 780,002.55 × 436,020.90
  4. Step 4: Simplify right side
    520,001.70x = 340,097,413,853.30
  5. Step 5: Solve for x
    x = 340,097,413,853.30/520,001.70
  6. Step 6: Final answer
    x = 654,031.35

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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.