Home / 1,521.95-2,280.30-740.90

Finding the Fourth Proportional to 1,521.95, 2,280.30 and 740.90

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Solution

The fourth proportional to 1,521.95, 2,280.30 and 740.90 is: 1,110.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.95 : 2,280.30 = 740.90 : x
  2. Step 2: Convert to fraction form
    1,521.95/2,280.30 = 740.90/x
  3. Step 3: Cross multiply
    1,521.95x = 2,280.30 × 740.90
  4. Step 4: Simplify right side
    1,521.95x = 1,689,462.87
  5. Step 5: Solve for x
    x = 1,689,462.87/1,521.95
  6. Step 6: Final answer
    x = 1,110.07

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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.