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Finding the Fourth Proportional to 712,708.26, 983,537.64 and 390,429.96

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Solution

The fourth proportional to 712,708.26, 983,537.64 and 390,429.96 is: 538,793.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,708.26 : 983,537.64 = 390,429.96 : x
  2. Step 2: Convert to fraction form
    712,708.26/983,537.64 = 390,429.96/x
  3. Step 3: Cross multiply
    712,708.26x = 983,537.64 × 390,429.96
  4. Step 4: Simplify right side
    712,708.26x = 384,002,561,443.69
  5. Step 5: Solve for x
    x = 384,002,561,443.69/712,708.26
  6. Step 6: Final answer
    x = 538,793.48

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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.