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Finding the Fourth Proportional to 1,678.91, 2,316.99 and 932.95

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Solution

The fourth proportional to 1,678.91, 2,316.99 and 932.95 is: 1,287.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.91 : 2,316.99 = 932.95 : x
  2. Step 2: Convert to fraction form
    1,678.91/2,316.99 = 932.95/x
  3. Step 3: Cross multiply
    1,678.91x = 2,316.99 × 932.95
  4. Step 4: Simplify right side
    1,678.91x = 2,161,621.90
  5. Step 5: Solve for x
    x = 2,161,621.90/1,678.91
  6. Step 6: Final answer
    x = 1,287.52

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1.5x scale

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.