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Finding the Fourth Proportional to 711.59, 981.79 and 431.93

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Solution

The fourth proportional to 711.59, 981.79 and 431.93 is: 595.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.59 : 981.79 = 431.93 : x
  2. Step 2: Convert to fraction form
    711.59/981.79 = 431.93/x
  3. Step 3: Cross multiply
    711.59x = 981.79 × 431.93
  4. Step 4: Simplify right side
    711.59x = 424,065.93
  5. Step 5: Solve for x
    x = 424,065.93/711.59
  6. Step 6: Final answer
    x = 595.95

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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.