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Finding the Fourth Proportional to 972.04, 1,341.40 and 529.92

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Solution

The fourth proportional to 972.04, 1,341.40 and 529.92 is: 731.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.04 : 1,341.40 = 529.92 : x
  2. Step 2: Convert to fraction form
    972.04/1,341.40 = 529.92/x
  3. Step 3: Cross multiply
    972.04x = 1,341.40 × 529.92
  4. Step 4: Simplify right side
    972.04x = 710,834.69
  5. Step 5: Solve for x
    x = 710,834.69/972.04
  6. Step 6: Final answer
    x = 731.28

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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.