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Finding the Fourth Proportional to 576.15, 868.95 and 557.67

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Solution

The fourth proportional to 576.15, 868.95 and 557.67 is: 841.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.15 : 868.95 = 557.67 : x
  2. Step 2: Convert to fraction form
    576.15/868.95 = 557.67/x
  3. Step 3: Cross multiply
    576.15x = 868.95 × 557.67
  4. Step 4: Simplify right side
    576.15x = 484,587.35
  5. Step 5: Solve for x
    x = 484,587.35/576.15
  6. Step 6: Final answer
    x = 841.08

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.