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Finding the Fourth Proportional to 760.59, 1,135.69 and 614.79

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Solution

The fourth proportional to 760.59, 1,135.69 and 614.79 is: 917.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.59 : 1,135.69 = 614.79 : x
  2. Step 2: Convert to fraction form
    760.59/1,135.69 = 614.79/x
  3. Step 3: Cross multiply
    760.59x = 1,135.69 × 614.79
  4. Step 4: Simplify right side
    760.59x = 698,209.32
  5. Step 5: Solve for x
    x = 698,209.32/760.59
  6. Step 6: Final answer
    x = 917.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.