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Finding the Fourth Proportional to 887.69, 1,225.17 and 514.76

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Solution

The fourth proportional to 887.69, 1,225.17 and 514.76 is: 710.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.69 : 1,225.17 = 514.76 : x
  2. Step 2: Convert to fraction form
    887.69/1,225.17 = 514.76/x
  3. Step 3: Cross multiply
    887.69x = 1,225.17 × 514.76
  4. Step 4: Simplify right side
    887.69x = 630,662.38
  5. Step 5: Solve for x
    x = 630,662.38/887.69
  6. Step 6: Final answer
    x = 710.46

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Double scale
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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.