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Finding the Fourth Proportional to 561.35, 841.60 and 387.52

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Solution

The fourth proportional to 561.35, 841.60 and 387.52 is: 580.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.35 : 841.60 = 387.52 : x
  2. Step 2: Convert to fraction form
    561.35/841.60 = 387.52/x
  3. Step 3: Cross multiply
    561.35x = 841.60 × 387.52
  4. Step 4: Simplify right side
    561.35x = 326,133.76
  5. Step 5: Solve for x
    x = 326,133.76/561.35
  6. Step 6: Final answer
    x = 580.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.