Home / 1,046.32-1,569.78-315.90

Finding the Fourth Proportional to 1,046.32, 1,569.78 and 315.90

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Solution

The fourth proportional to 1,046.32, 1,569.78 and 315.90 is: 473.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,046.32 : 1,569.78 = 315.90 : x
  2. Step 2: Convert to fraction form
    1,046.32/1,569.78 = 315.90/x
  3. Step 3: Cross multiply
    1,046.32x = 1,569.78 × 315.90
  4. Step 4: Simplify right side
    1,046.32x = 495,893.50
  5. Step 5: Solve for x
    x = 495,893.50/1,046.32
  6. Step 6: Final answer
    x = 473.94

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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.