Home / 1,017.20-1,403.68-624.16

Finding the Fourth Proportional to 1,017.20, 1,403.68 and 624.16

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Solution

The fourth proportional to 1,017.20, 1,403.68 and 624.16 is: 861.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.20 : 1,403.68 = 624.16 : x
  2. Step 2: Convert to fraction form
    1,017.20/1,403.68 = 624.16/x
  3. Step 3: Cross multiply
    1,017.20x = 1,403.68 × 624.16
  4. Step 4: Simplify right side
    1,017.20x = 876,120.91
  5. Step 5: Solve for x
    x = 876,120.91/1,017.20
  6. Step 6: Final answer
    x = 861.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.