Home / 708,156,369.60-977,256,731.42-390,609,494.20

Finding the Fourth Proportional to 708,156,369.60, 977,256,731.42 and 390,609,494.20

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Solution

The fourth proportional to 708,156,369.60, 977,256,731.42 and 390,609,494.20 is: 539,041,621.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,156,369.60 : 977,256,731.42 = 390,609,494.20 : x
  2. Step 2: Convert to fraction form
    708,156,369.60/977,256,731.42 = 390,609,494.20/x
  3. Step 3: Cross multiply
    708,156,369.60x = 977,256,731.42 × 390,609,494.20
  4. Step 4: Simplify right side
    708,156,369.60x = 381,725,757,564,244,800
  5. Step 5: Solve for x
    x = 381,725,757,564,244,800/708,156,369.60
  6. Step 6: Final answer
    x = 539,041,621.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.