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Finding the Fourth Proportional to 487.19, 671.56 and 373.91

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Solution

The fourth proportional to 487.19, 671.56 and 373.91 is: 515.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.19 : 671.56 = 373.91 : x
  2. Step 2: Convert to fraction form
    487.19/671.56 = 373.91/x
  3. Step 3: Cross multiply
    487.19x = 671.56 × 373.91
  4. Step 4: Simplify right side
    487.19x = 251,098.71
  5. Step 5: Solve for x
    x = 251,098.71/487.19
  6. Step 6: Final answer
    x = 515.40

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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.