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Finding the Fourth Proportional to 890.68, 1,334.80 and 500.87

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Solution

The fourth proportional to 890.68, 1,334.80 and 500.87 is: 750.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.68 : 1,334.80 = 500.87 : x
  2. Step 2: Convert to fraction form
    890.68/1,334.80 = 500.87/x
  3. Step 3: Cross multiply
    890.68x = 1,334.80 × 500.87
  4. Step 4: Simplify right side
    890.68x = 668,561.28
  5. Step 5: Solve for x
    x = 668,561.28/890.68
  6. Step 6: Final answer
    x = 750.62

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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.