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Finding the Fourth Proportional to 661,304.24, 912,603.48 and 389,384

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Solution

The fourth proportional to 661,304.24, 912,603.48 and 389,384 is: 537,352.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,304.24 : 912,603.48 = 389,384 : x
  2. Step 2: Convert to fraction form
    661,304.24/912,603.48 = 389,384/x
  3. Step 3: Cross multiply
    661,304.24x = 912,603.48 × 389,384
  4. Step 4: Simplify right side
    661,304.24x = 355,353,193,456.32
  5. Step 5: Solve for x
    x = 355,353,193,456.32/661,304.24
  6. Step 6: Final answer
    x = 537,352.06

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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.