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Finding the Fourth Proportional to 924.32, 1,386.48 and 316.32

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Solution

The fourth proportional to 924.32, 1,386.48 and 316.32 is: 474.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.32 : 1,386.48 = 316.32 : x
  2. Step 2: Convert to fraction form
    924.32/1,386.48 = 316.32/x
  3. Step 3: Cross multiply
    924.32x = 1,386.48 × 316.32
  4. Step 4: Simplify right side
    924.32x = 438,571.35
  5. Step 5: Solve for x
    x = 438,571.35/924.32
  6. Step 6: Final answer
    x = 474.48

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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.