Home / 1,913.12-2,869.88-614.28

Finding the Fourth Proportional to 1,913.12, 2,869.88 and 614.28

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Solution

The fourth proportional to 1,913.12, 2,869.88 and 614.28 is: 921.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.12 : 2,869.88 = 614.28 : x
  2. Step 2: Convert to fraction form
    1,913.12/2,869.88 = 614.28/x
  3. Step 3: Cross multiply
    1,913.12x = 2,869.88 × 614.28
  4. Step 4: Simplify right side
    1,913.12x = 1,762,909.89
  5. Step 5: Solve for x
    x = 1,762,909.89/1,913.12
  6. Step 6: Final answer
    x = 921.48

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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.