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Finding the Fourth Proportional to 1,148.65, 1,585.12 and 624.68

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Solution

The fourth proportional to 1,148.65, 1,585.12 and 624.68 is: 862.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.65 : 1,585.12 = 624.68 : x
  2. Step 2: Convert to fraction form
    1,148.65/1,585.12 = 624.68/x
  3. Step 3: Cross multiply
    1,148.65x = 1,585.12 × 624.68
  4. Step 4: Simplify right side
    1,148.65x = 990,192.76
  5. Step 5: Solve for x
    x = 990,192.76/1,148.65
  6. Step 6: Final answer
    x = 862.05

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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.