Home / 485,039,385.20-727,559,077.80-431,470,132.40

Finding the Fourth Proportional to 485,039,385.20, 727,559,077.80 and 431,470,132.40

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Solution

The fourth proportional to 485,039,385.20, 727,559,077.80 and 431,470,132.40 is: 647,205,198.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,039,385.20 : 727,559,077.80 = 431,470,132.40 : x
  2. Step 2: Convert to fraction form
    485,039,385.20/727,559,077.80 = 431,470,132.40/x
  3. Step 3: Cross multiply
    485,039,385.20x = 727,559,077.80 × 431,470,132.40
  4. Step 4: Simplify right side
    485,039,385.20x = 313,920,011,627,187,840
  5. Step 5: Solve for x
    x = 313,920,011,627,187,840/485,039,385.20
  6. Step 6: Final answer
    x = 647,205,198.60

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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.