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Finding the Fourth Proportional to 864.55, 1,193.14 and 515.19

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Solution

The fourth proportional to 864.55, 1,193.14 and 515.19 is: 711.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.55 : 1,193.14 = 515.19 : x
  2. Step 2: Convert to fraction form
    864.55/1,193.14 = 515.19/x
  3. Step 3: Cross multiply
    864.55x = 1,193.14 × 515.19
  4. Step 4: Simplify right side
    864.55x = 614,693.80
  5. Step 5: Solve for x
    x = 614,693.80/864.55
  6. Step 6: Final answer
    x = 711.00

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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.