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Finding the Fourth Proportional to 760.89, 1,050.18 and 498.90

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Solution

The fourth proportional to 760.89, 1,050.18 and 498.90 is: 688.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.89 : 1,050.18 = 498.90 : x
  2. Step 2: Convert to fraction form
    760.89/1,050.18 = 498.90/x
  3. Step 3: Cross multiply
    760.89x = 1,050.18 × 498.90
  4. Step 4: Simplify right side
    760.89x = 523,934.80
  5. Step 5: Solve for x
    x = 523,934.80/760.89
  6. Step 6: Final answer
    x = 688.58

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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.