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Finding the Fourth Proportional to 1,678.34, 2,316.12 and 932.34

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Solution

The fourth proportional to 1,678.34, 2,316.12 and 932.34 is: 1,286.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.34 : 2,316.12 = 932.34 : x
  2. Step 2: Convert to fraction form
    1,678.34/2,316.12 = 932.34/x
  3. Step 3: Cross multiply
    1,678.34x = 2,316.12 × 932.34
  4. Step 4: Simplify right side
    1,678.34x = 2,159,411.32
  5. Step 5: Solve for x
    x = 2,159,411.32/1,678.34
  6. Step 6: Final answer
    x = 1,286.64

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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.