Home / 1,507.10-2,259.30-987.35

Finding the Fourth Proportional to 1,507.10, 2,259.30 and 987.35

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Solution

The fourth proportional to 1,507.10, 2,259.30 and 987.35 is: 1,480.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,507.10 : 2,259.30 = 987.35 : x
  2. Step 2: Convert to fraction form
    1,507.10/2,259.30 = 987.35/x
  3. Step 3: Cross multiply
    1,507.10x = 2,259.30 × 987.35
  4. Step 4: Simplify right side
    1,507.10x = 2,230,719.86
  5. Step 5: Solve for x
    x = 2,230,719.86/1,507.10
  6. Step 6: Final answer
    x = 1,480.14

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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.