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Finding the Fourth Proportional to 407.16, 562.12 and 313.72

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Solution

The fourth proportional to 407.16, 562.12 and 313.72 is: 433.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.16 : 562.12 = 313.72 : x
  2. Step 2: Convert to fraction form
    407.16/562.12 = 313.72/x
  3. Step 3: Cross multiply
    407.16x = 562.12 × 313.72
  4. Step 4: Simplify right side
    407.16x = 176,348.29
  5. Step 5: Solve for x
    x = 176,348.29/407.16
  6. Step 6: Final answer
    x = 433.12

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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.