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Finding the Fourth Proportional to 581.12, 803.58 and 488.98

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Solution

The fourth proportional to 581.12, 803.58 and 488.98 is: 676.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.12 : 803.58 = 488.98 : x
  2. Step 2: Convert to fraction form
    581.12/803.58 = 488.98/x
  3. Step 3: Cross multiply
    581.12x = 803.58 × 488.98
  4. Step 4: Simplify right side
    581.12x = 392,934.55
  5. Step 5: Solve for x
    x = 392,934.55/581.12
  6. Step 6: Final answer
    x = 676.17

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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.