Home / 1,387.52-2,089.47-1,207.08

Finding the Fourth Proportional to 1,387.52, 2,089.47 and 1,207.08

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Solution

The fourth proportional to 1,387.52, 2,089.47 and 1,207.08 is: 1,817.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.52 : 2,089.47 = 1,207.08 : x
  2. Step 2: Convert to fraction form
    1,387.52/2,089.47 = 1,207.08/x
  3. Step 3: Cross multiply
    1,387.52x = 2,089.47 × 1,207.08
  4. Step 4: Simplify right side
    1,387.52x = 2,522,157.45
  5. Step 5: Solve for x
    x = 2,522,157.45/1,387.52
  6. Step 6: Final answer
    x = 1,817.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.