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Finding the Fourth Proportional to 1,048.65, 1,573.28 and 318.34

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Solution

The fourth proportional to 1,048.65, 1,573.28 and 318.34 is: 477.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.65 : 1,573.28 = 318.34 : x
  2. Step 2: Convert to fraction form
    1,048.65/1,573.28 = 318.34/x
  3. Step 3: Cross multiply
    1,048.65x = 1,573.28 × 318.34
  4. Step 4: Simplify right side
    1,048.65x = 500,837.96
  5. Step 5: Solve for x
    x = 500,837.96/1,048.65
  6. Step 6: Final answer
    x = 477.60

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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.