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Finding the Fourth Proportional to 561,663,142.60, 842,494,713.90 and 425,614,246.60

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Solution

The fourth proportional to 561,663,142.60, 842,494,713.90 and 425,614,246.60 is: 638,421,369.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,663,142.60 : 842,494,713.90 = 425,614,246.60 : x
  2. Step 2: Convert to fraction form
    561,663,142.60/842,494,713.90 = 425,614,246.60/x
  3. Step 3: Cross multiply
    561,663,142.60x = 842,494,713.90 × 425,614,246.60
  4. Step 4: Simplify right side
    561,663,142.60x = 358,577,752,921,031,040
  5. Step 5: Solve for x
    x = 358,577,752,921,031,040/561,663,142.60
  6. Step 6: Final answer
    x = 638,421,369.90

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Similar ratio
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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.