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Finding the Fourth Proportional to 691.79, 954.54 and 429.69

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Solution

The fourth proportional to 691.79, 954.54 and 429.69 is: 592.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.79 : 954.54 = 429.69 : x
  2. Step 2: Convert to fraction form
    691.79/954.54 = 429.69/x
  3. Step 3: Cross multiply
    691.79x = 954.54 × 429.69
  4. Step 4: Simplify right side
    691.79x = 410,156.29
  5. Step 5: Solve for x
    x = 410,156.29/691.79
  6. Step 6: Final answer
    x = 592.89

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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.