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Finding the Fourth Proportional to 887.50, 1,330.66 and 425.35

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Solution

The fourth proportional to 887.50, 1,330.66 and 425.35 is: 637.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.50 : 1,330.66 = 425.35 : x
  2. Step 2: Convert to fraction form
    887.50/1,330.66 = 425.35/x
  3. Step 3: Cross multiply
    887.50x = 1,330.66 × 425.35
  4. Step 4: Simplify right side
    887.50x = 565,996.23
  5. Step 5: Solve for x
    x = 565,996.23/887.50
  6. Step 6: Final answer
    x = 637.74

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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.