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Finding the Fourth Proportional to 631,065.62, 870,982.80 and 372,931.58

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Solution

The fourth proportional to 631,065.62, 870,982.80 and 372,931.58 is: 514,711.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,065.62 : 870,982.80 = 372,931.58 : x
  2. Step 2: Convert to fraction form
    631,065.62/870,982.80 = 372,931.58/x
  3. Step 3: Cross multiply
    631,065.62x = 870,982.80 × 372,931.58
  4. Step 4: Simplify right side
    631,065.62x = 324,816,991,756.82
  5. Step 5: Solve for x
    x = 324,816,991,756.82/631,065.62
  6. Step 6: Final answer
    x = 514,711.91

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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.