Home / 1,535.38-2,118.10-1,038.19

Finding the Fourth Proportional to 1,535.38, 2,118.10 and 1,038.19

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Solution

The fourth proportional to 1,535.38, 2,118.10 and 1,038.19 is: 1,432.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,535.38 : 2,118.10 = 1,038.19 : x
  2. Step 2: Convert to fraction form
    1,535.38/2,118.10 = 1,038.19/x
  3. Step 3: Cross multiply
    1,535.38x = 2,118.10 × 1,038.19
  4. Step 4: Simplify right side
    1,535.38x = 2,198,990.24
  5. Step 5: Solve for x
    x = 2,198,990.24/1,535.38
  6. Step 6: Final answer
    x = 1,432.21

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Half scale
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Double scale
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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.