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Finding the Fourth Proportional to 887.64, 1,225.05 and 514.59

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Solution

The fourth proportional to 887.64, 1,225.05 and 514.59 is: 710.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.64 : 1,225.05 = 514.59 : x
  2. Step 2: Convert to fraction form
    887.64/1,225.05 = 514.59/x
  3. Step 3: Cross multiply
    887.64x = 1,225.05 × 514.59
  4. Step 4: Simplify right side
    887.64x = 630,398.48
  5. Step 5: Solve for x
    x = 630,398.48/887.64
  6. Step 6: Final answer
    x = 710.20

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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.