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Finding the Fourth Proportional to 887.15, 1,330.72 and 400.07

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Solution

The fourth proportional to 887.15, 1,330.72 and 400.07 is: 600.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.15 : 1,330.72 = 400.07 : x
  2. Step 2: Convert to fraction form
    887.15/1,330.72 = 400.07/x
  3. Step 3: Cross multiply
    887.15x = 1,330.72 × 400.07
  4. Step 4: Simplify right side
    887.15x = 532,373.50
  5. Step 5: Solve for x
    x = 532,373.50/887.15
  6. Step 6: Final answer
    x = 600.10

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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.