Home / 1,528.90-2,110.65-1,279.30

Finding the Fourth Proportional to 1,528.90, 2,110.65 and 1,279.30

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Solution

The fourth proportional to 1,528.90, 2,110.65 and 1,279.30 is: 1,766.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.90 : 2,110.65 = 1,279.30 : x
  2. Step 2: Convert to fraction form
    1,528.90/2,110.65 = 1,279.30/x
  3. Step 3: Cross multiply
    1,528.90x = 2,110.65 × 1,279.30
  4. Step 4: Simplify right side
    1,528.90x = 2,700,154.55
  5. Step 5: Solve for x
    x = 2,700,154.55/1,528.90
  6. Step 6: Final answer
    x = 1,766.08

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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.