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Finding the Fourth Proportional to 762.18, 1,139.10 and 555.36

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Solution

The fourth proportional to 762.18, 1,139.10 and 555.36 is: 830.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.18 : 1,139.10 = 555.36 : x
  2. Step 2: Convert to fraction form
    762.18/1,139.10 = 555.36/x
  3. Step 3: Cross multiply
    762.18x = 1,139.10 × 555.36
  4. Step 4: Simplify right side
    762.18x = 632,610.58
  5. Step 5: Solve for x
    x = 632,610.58/762.18
  6. Step 6: Final answer
    x = 830.00

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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.