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Finding the Fourth Proportional to 1,045.86, 1,568.70 and 315.60

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Solution

The fourth proportional to 1,045.86, 1,568.70 and 315.60 is: 473.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.86 : 1,568.70 = 315.60 : x
  2. Step 2: Convert to fraction form
    1,045.86/1,568.70 = 315.60/x
  3. Step 3: Cross multiply
    1,045.86x = 1,568.70 × 315.60
  4. Step 4: Simplify right side
    1,045.86x = 495,081.72
  5. Step 5: Solve for x
    x = 495,081.72/1,045.86
  6. Step 6: Final answer
    x = 473.37

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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.