Home / 1,503.38-2,074.67-913.80

Finding the Fourth Proportional to 1,503.38, 2,074.67 and 913.80

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Solution

The fourth proportional to 1,503.38, 2,074.67 and 913.80 is: 1,261.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,503.38 : 2,074.67 = 913.80 : x
  2. Step 2: Convert to fraction form
    1,503.38/2,074.67 = 913.80/x
  3. Step 3: Cross multiply
    1,503.38x = 2,074.67 × 913.80
  4. Step 4: Simplify right side
    1,503.38x = 1,895,828.88
  5. Step 5: Solve for x
    x = 1,895,828.88/1,503.38
  6. Step 6: Final answer
    x = 1,261.05

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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.