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Finding the Fourth Proportional to 889.57, 1,332.65 and 693.66

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Solution

The fourth proportional to 889.57, 1,332.65 and 693.66 is: 1,039.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.57 : 1,332.65 = 693.66 : x
  2. Step 2: Convert to fraction form
    889.57/1,332.65 = 693.66/x
  3. Step 3: Cross multiply
    889.57x = 1,332.65 × 693.66
  4. Step 4: Simplify right side
    889.57x = 924,395.87
  5. Step 5: Solve for x
    x = 924,395.87/889.57
  6. Step 6: Final answer
    x = 1,039.15

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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.