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Finding the Fourth Proportional to 661,082.73, 912,483.34 and 389,308.28

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Solution

The fourth proportional to 661,082.73, 912,483.34 and 389,308.28 is: 537,356.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,082.73 : 912,483.34 = 389,308.28 : x
  2. Step 2: Convert to fraction form
    661,082.73/912,483.34 = 389,308.28/x
  3. Step 3: Cross multiply
    661,082.73x = 912,483.34 × 389,308.28
  4. Step 4: Simplify right side
    661,082.73x = 355,237,316,278.23
  5. Step 5: Solve for x
    x = 355,237,316,278.23/661,082.73
  6. Step 6: Final answer
    x = 537,356.82

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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.