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Finding the Fourth Proportional to 1,547.68, 2,321.46 and 393.46

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Solution

The fourth proportional to 1,547.68, 2,321.46 and 393.46 is: 590.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.68 : 2,321.46 = 393.46 : x
  2. Step 2: Convert to fraction form
    1,547.68/2,321.46 = 393.46/x
  3. Step 3: Cross multiply
    1,547.68x = 2,321.46 × 393.46
  4. Step 4: Simplify right side
    1,547.68x = 913,401.65
  5. Step 5: Solve for x
    x = 913,401.65/1,547.68
  6. Step 6: Final answer
    x = 590.17

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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.