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Finding the Fourth Proportional to 679.59, 937.60 and 430.87

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Solution

The fourth proportional to 679.59, 937.60 and 430.87 is: 594.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.59 : 937.60 = 430.87 : x
  2. Step 2: Convert to fraction form
    679.59/937.60 = 430.87/x
  3. Step 3: Cross multiply
    679.59x = 937.60 × 430.87
  4. Step 4: Simplify right side
    679.59x = 403,983.71
  5. Step 5: Solve for x
    x = 403,983.71/679.59
  6. Step 6: Final answer
    x = 594.45

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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.