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Finding the Fourth Proportional to 661,014, 912,277.08 and 392,742

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Solution

The fourth proportional to 661,014, 912,277.08 and 392,742 is: 542,030.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,014 : 912,277.08 = 392,742 : x
  2. Step 2: Convert to fraction form
    661,014/912,277.08 = 392,742/x
  3. Step 3: Cross multiply
    661,014x = 912,277.08 × 392,742
  4. Step 4: Simplify right side
    661,014x = 358,289,524,953.36
  5. Step 5: Solve for x
    x = 358,289,524,953.36/661,014
  6. Step 6: Final answer
    x = 542,030.16

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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.