Home / 1,031.28-1,547.46-621.78

Finding the Fourth Proportional to 1,031.28, 1,547.46 and 621.78

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Solution

The fourth proportional to 1,031.28, 1,547.46 and 621.78 is: 933.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.28 : 1,547.46 = 621.78 : x
  2. Step 2: Convert to fraction form
    1,031.28/1,547.46 = 621.78/x
  3. Step 3: Cross multiply
    1,031.28x = 1,547.46 × 621.78
  4. Step 4: Simplify right side
    1,031.28x = 962,179.68
  5. Step 5: Solve for x
    x = 962,179.68/1,031.28
  6. Step 6: Final answer
    x = 933.00

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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.