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Finding the Fourth Proportional to 704.75, 972.45 and 424.79

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Solution

The fourth proportional to 704.75, 972.45 and 424.79 is: 586.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.75 : 972.45 = 424.79 : x
  2. Step 2: Convert to fraction form
    704.75/972.45 = 424.79/x
  3. Step 3: Cross multiply
    704.75x = 972.45 × 424.79
  4. Step 4: Simplify right side
    704.75x = 413,087.04
  5. Step 5: Solve for x
    x = 413,087.04/704.75
  6. Step 6: Final answer
    x = 586.15

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1.5x scale

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.