Home / 485,516,988.30-728,275,482.45-429,396,818.70

Finding the Fourth Proportional to 485,516,988.30, 728,275,482.45 and 429,396,818.70

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Solution

The fourth proportional to 485,516,988.30, 728,275,482.45 and 429,396,818.70 is: 644,095,228.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,516,988.30 : 728,275,482.45 = 429,396,818.70 : x
  2. Step 2: Convert to fraction form
    485,516,988.30/728,275,482.45 = 429,396,818.70/x
  3. Step 3: Cross multiply
    485,516,988.30x = 728,275,482.45 × 429,396,818.70
  4. Step 4: Simplify right side
    485,516,988.30x = 312,719,175,301,237,696
  5. Step 5: Solve for x
    x = 312,719,175,301,237,696/485,516,988.30
  6. Step 6: Final answer
    x = 644,095,228.05

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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.