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Finding the Fourth Proportional to 918.31, 1,376.80 and 589.62

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Solution

The fourth proportional to 918.31, 1,376.80 and 589.62 is: 884.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.31 : 1,376.80 = 589.62 : x
  2. Step 2: Convert to fraction form
    918.31/1,376.80 = 589.62/x
  3. Step 3: Cross multiply
    918.31x = 1,376.80 × 589.62
  4. Step 4: Simplify right side
    918.31x = 811,788.82
  5. Step 5: Solve for x
    x = 811,788.82/918.31
  6. Step 6: Final answer
    x = 884.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.