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Finding the Fourth Proportional to 887.86, 1,225.45 and 515.06

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Solution

The fourth proportional to 887.86, 1,225.45 and 515.06 is: 710.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.86 : 1,225.45 = 515.06 : x
  2. Step 2: Convert to fraction form
    887.86/1,225.45 = 515.06/x
  3. Step 3: Cross multiply
    887.86x = 1,225.45 × 515.06
  4. Step 4: Simplify right side
    887.86x = 631,180.84
  5. Step 5: Solve for x
    x = 631,180.84/887.86
  6. Step 6: Final answer
    x = 710.90

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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.