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Finding the Fourth Proportional to 581.68, 803.28 and 415.90

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Solution

The fourth proportional to 581.68, 803.28 and 415.90 is: 574.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.68 : 803.28 = 415.90 : x
  2. Step 2: Convert to fraction form
    581.68/803.28 = 415.90/x
  3. Step 3: Cross multiply
    581.68x = 803.28 × 415.90
  4. Step 4: Simplify right side
    581.68x = 334,084.15
  5. Step 5: Solve for x
    x = 334,084.15/581.68
  6. Step 6: Final answer
    x = 574.34

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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.