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Finding the Fourth Proportional to 718,742,569.26, 991,864,737.90 and 388,717,708.26

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Solution

The fourth proportional to 718,742,569.26, 991,864,737.90 and 388,717,708.26 is: 536,430,433.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,742,569.26 : 991,864,737.90 = 388,717,708.26 : x
  2. Step 2: Convert to fraction form
    718,742,569.26/991,864,737.90 = 388,717,708.26/x
  3. Step 3: Cross multiply
    718,742,569.26x = 991,864,737.90 × 388,717,708.26
  4. Step 4: Simplify right side
    718,742,569.26x = 385,555,387,820,393,536
  5. Step 5: Solve for x
    x = 385,555,387,820,393,536/718,742,569.26
  6. Step 6: Final answer
    x = 536,430,433.25

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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.