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Finding the Fourth Proportional to 661,583.96, 912,964.51 and 375,129.56

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Solution

The fourth proportional to 661,583.96, 912,964.51 and 375,129.56 is: 517,666.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,583.96 : 912,964.51 = 375,129.56 : x
  2. Step 2: Convert to fraction form
    661,583.96/912,964.51 = 375,129.56/x
  3. Step 3: Cross multiply
    661,583.96x = 912,964.51 × 375,129.56
  4. Step 4: Simplify right side
    661,583.96x = 342,479,969,429.27
  5. Step 5: Solve for x
    x = 342,479,969,429.27/661,583.96
  6. Step 6: Final answer
    x = 517,666.68

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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.