Home / 485,516,999.30-728,275,498.95-429,396,829.70

Finding the Fourth Proportional to 485,516,999.30, 728,275,498.95 and 429,396,829.70

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Solution

The fourth proportional to 485,516,999.30, 728,275,498.95 and 429,396,829.70 is: 644,095,244.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,516,999.30 : 728,275,498.95 = 429,396,829.70 : x
  2. Step 2: Convert to fraction form
    485,516,999.30/728,275,498.95 = 429,396,829.70/x
  3. Step 3: Cross multiply
    485,516,999.30x = 728,275,498.95 × 429,396,829.70
  4. Step 4: Simplify right side
    485,516,999.30x = 312,719,190,397,315,712
  5. Step 5: Solve for x
    x = 312,719,190,397,315,712/485,516,999.30
  6. Step 6: Final answer
    x = 644,095,244.55

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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.