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Finding the Fourth Proportional to 738.60, 1,018.62 and 591.18

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Solution

The fourth proportional to 738.60, 1,018.62 and 591.18 is: 815.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.60 : 1,018.62 = 591.18 : x
  2. Step 2: Convert to fraction form
    738.60/1,018.62 = 591.18/x
  3. Step 3: Cross multiply
    738.60x = 1,018.62 × 591.18
  4. Step 4: Simplify right side
    738.60x = 602,187.77
  5. Step 5: Solve for x
    x = 602,187.77/738.60
  6. Step 6: Final answer
    x = 815.31

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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.