Home / 1,439.40-2,158.65-709.49

Finding the Fourth Proportional to 1,439.40, 2,158.65 and 709.49

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Solution

The fourth proportional to 1,439.40, 2,158.65 and 709.49 is: 1,064.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.40 : 2,158.65 = 709.49 : x
  2. Step 2: Convert to fraction form
    1,439.40/2,158.65 = 709.49/x
  3. Step 3: Cross multiply
    1,439.40x = 2,158.65 × 709.49
  4. Step 4: Simplify right side
    1,439.40x = 1,531,545.99
  5. Step 5: Solve for x
    x = 1,531,545.99/1,439.40
  6. Step 6: Final answer
    x = 1,064.01

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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.