Home / 1,381.02-1,880.28-1,376.70

Finding the Fourth Proportional to 1,381.02, 1,880.28 and 1,376.70

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Solution

The fourth proportional to 1,381.02, 1,880.28 and 1,376.70 is: 1,874.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.02 : 1,880.28 = 1,376.70 : x
  2. Step 2: Convert to fraction form
    1,381.02/1,880.28 = 1,376.70/x
  3. Step 3: Cross multiply
    1,381.02x = 1,880.28 × 1,376.70
  4. Step 4: Simplify right side
    1,381.02x = 2,588,581.48
  5. Step 5: Solve for x
    x = 2,588,581.48/1,381.02
  6. Step 6: Final answer
    x = 1,874.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.