Home / 1,580.13-2,380.90-1,312.22

Finding the Fourth Proportional to 1,580.13, 2,380.90 and 1,312.22

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Solution

The fourth proportional to 1,580.13, 2,380.90 and 1,312.22 is: 1,977.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.13 : 2,380.90 = 1,312.22 : x
  2. Step 2: Convert to fraction form
    1,580.13/2,380.90 = 1,312.22/x
  3. Step 3: Cross multiply
    1,580.13x = 2,380.90 × 1,312.22
  4. Step 4: Simplify right side
    1,580.13x = 3,124,264.60
  5. Step 5: Solve for x
    x = 3,124,264.60/1,580.13
  6. Step 6: Final answer
    x = 1,977.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.