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Finding the Fourth Proportional to 1,547.48, 2,321.68 and 451.92

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Solution

The fourth proportional to 1,547.48, 2,321.68 and 451.92 is: 678.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.48 : 2,321.68 = 451.92 : x
  2. Step 2: Convert to fraction form
    1,547.48/2,321.68 = 451.92/x
  3. Step 3: Cross multiply
    1,547.48x = 2,321.68 × 451.92
  4. Step 4: Simplify right side
    1,547.48x = 1,049,213.63
  5. Step 5: Solve for x
    x = 1,049,213.63/1,547.48
  6. Step 6: Final answer
    x = 678.01

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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.