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Finding the Fourth Proportional to 557.29, 829.17 and 555.40

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Solution

The fourth proportional to 557.29, 829.17 and 555.40 is: 826.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.29 : 829.17 = 555.40 : x
  2. Step 2: Convert to fraction form
    557.29/829.17 = 555.40/x
  3. Step 3: Cross multiply
    557.29x = 829.17 × 555.40
  4. Step 4: Simplify right side
    557.29x = 460,521.02
  5. Step 5: Solve for x
    x = 460,521.02/557.29
  6. Step 6: Final answer
    x = 826.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.