Home / 1,528.40-2,288.71-1,280.95

Finding the Fourth Proportional to 1,528.40, 2,288.71 and 1,280.95

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Solution

The fourth proportional to 1,528.40, 2,288.71 and 1,280.95 is: 1,918.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.40 : 2,288.71 = 1,280.95 : x
  2. Step 2: Convert to fraction form
    1,528.40/2,288.71 = 1,280.95/x
  3. Step 3: Cross multiply
    1,528.40x = 2,288.71 × 1,280.95
  4. Step 4: Simplify right side
    1,528.40x = 2,931,711.63
  5. Step 5: Solve for x
    x = 2,931,711.63/1,528.40
  6. Step 6: Final answer
    x = 1,918.16

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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.