Home / 646,429,129.20-969,779,874.60-209,695,711.92

Finding the Fourth Proportional to 646,429,129.20, 969,779,874.60 and 209,695,711.92

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Solution

The fourth proportional to 646,429,129.20, 969,779,874.60 and 209,695,711.92 is: 314,587,743.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,429,129.20 : 969,779,874.60 = 209,695,711.92 : x
  2. Step 2: Convert to fraction form
    646,429,129.20/969,779,874.60 = 209,695,711.92/x
  3. Step 3: Cross multiply
    646,429,129.20x = 969,779,874.60 × 209,695,711.92
  4. Step 4: Simplify right side
    646,429,129.20x = 203,358,681,209,935,328
  5. Step 5: Solve for x
    x = 203,358,681,209,935,328/646,429,129.20
  6. Step 6: Final answer
    x = 314,587,743.69

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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.