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Finding the Fourth Proportional to 719,463.80, 992,930.70 and 417,639.80

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Solution

The fourth proportional to 719,463.80, 992,930.70 and 417,639.80 is: 576,383.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,463.80 : 992,930.70 = 417,639.80 : x
  2. Step 2: Convert to fraction form
    719,463.80/992,930.70 = 417,639.80/x
  3. Step 3: Cross multiply
    719,463.80x = 992,930.70 × 417,639.80
  4. Step 4: Simplify right side
    719,463.80x = 414,687,378,961.86
  5. Step 5: Solve for x
    x = 414,687,378,961.86/719,463.80
  6. Step 6: Final answer
    x = 576,383.94

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1.5x scale

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.