Home / 1,514.40-2,088.48-990.72

Finding the Fourth Proportional to 1,514.40, 2,088.48 and 990.72

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Solution

The fourth proportional to 1,514.40, 2,088.48 and 990.72 is: 1,366.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,514.40 : 2,088.48 = 990.72 : x
  2. Step 2: Convert to fraction form
    1,514.40/2,088.48 = 990.72/x
  3. Step 3: Cross multiply
    1,514.40x = 2,088.48 × 990.72
  4. Step 4: Simplify right side
    1,514.40x = 2,069,098.91
  5. Step 5: Solve for x
    x = 2,069,098.91/1,514.40
  6. Step 6: Final answer
    x = 1,366.28

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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.