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Finding the Fourth Proportional to 760.91, 1,049.99 and 424.80

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Solution

The fourth proportional to 760.91, 1,049.99 and 424.80 is: 586.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.91 : 1,049.99 = 424.80 : x
  2. Step 2: Convert to fraction form
    760.91/1,049.99 = 424.80/x
  3. Step 3: Cross multiply
    760.91x = 1,049.99 × 424.80
  4. Step 4: Simplify right side
    760.91x = 446,033.63
  5. Step 5: Solve for x
    x = 446,033.63/760.91
  6. Step 6: Final answer
    x = 586.18

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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.