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Finding the Fourth Proportional to 718.04, 991.02 and 469.58

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Solution

The fourth proportional to 718.04, 991.02 and 469.58 is: 648.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.04 : 991.02 = 469.58 : x
  2. Step 2: Convert to fraction form
    718.04/991.02 = 469.58/x
  3. Step 3: Cross multiply
    718.04x = 991.02 × 469.58
  4. Step 4: Simplify right side
    718.04x = 465,358.22
  5. Step 5: Solve for x
    x = 465,358.22/718.04
  6. Step 6: Final answer
    x = 648.10

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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.