Home / 1,507.36-2,259.18-685.40

Finding the Fourth Proportional to 1,507.36, 2,259.18 and 685.40

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Solution

The fourth proportional to 1,507.36, 2,259.18 and 685.40 is: 1,027.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,507.36 : 2,259.18 = 685.40 : x
  2. Step 2: Convert to fraction form
    1,507.36/2,259.18 = 685.40/x
  3. Step 3: Cross multiply
    1,507.36x = 2,259.18 × 685.40
  4. Step 4: Simplify right side
    1,507.36x = 1,548,441.97
  5. Step 5: Solve for x
    x = 1,548,441.97/1,507.36
  6. Step 6: Final answer
    x = 1,027.25

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1.5x scale

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.