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Finding the Fourth Proportional to 1,042.92, 1,439.10 and 623.34

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Solution

The fourth proportional to 1,042.92, 1,439.10 and 623.34 is: 860.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.92 : 1,439.10 = 623.34 : x
  2. Step 2: Convert to fraction form
    1,042.92/1,439.10 = 623.34/x
  3. Step 3: Cross multiply
    1,042.92x = 1,439.10 × 623.34
  4. Step 4: Simplify right side
    1,042.92x = 897,048.59
  5. Step 5: Solve for x
    x = 897,048.59/1,042.92
  6. Step 6: Final answer
    x = 860.13

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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.