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Finding the Fourth Proportional to 1,031.83, 1,547.24 and 621.16

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Solution

The fourth proportional to 1,031.83, 1,547.24 and 621.16 is: 931.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.83 : 1,547.24 = 621.16 : x
  2. Step 2: Convert to fraction form
    1,031.83/1,547.24 = 621.16/x
  3. Step 3: Cross multiply
    1,031.83x = 1,547.24 × 621.16
  4. Step 4: Simplify right side
    1,031.83x = 961,076.62
  5. Step 5: Solve for x
    x = 961,076.62/1,031.83
  6. Step 6: Final answer
    x = 931.43

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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.