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Finding the Fourth Proportional to 714.72, 987.24 and 590.88

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Solution

The fourth proportional to 714.72, 987.24 and 590.88 is: 816.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.72 : 987.24 = 590.88 : x
  2. Step 2: Convert to fraction form
    714.72/987.24 = 590.88/x
  3. Step 3: Cross multiply
    714.72x = 987.24 × 590.88
  4. Step 4: Simplify right side
    714.72x = 583,340.37
  5. Step 5: Solve for x
    x = 583,340.37/714.72
  6. Step 6: Final answer
    x = 816.18

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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.