Home / 1,440.46-1,988.13-916.39

Finding the Fourth Proportional to 1,440.46, 1,988.13 and 916.39

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Solution

The fourth proportional to 1,440.46, 1,988.13 and 916.39 is: 1,264.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.46 : 1,988.13 = 916.39 : x
  2. Step 2: Convert to fraction form
    1,440.46/1,988.13 = 916.39/x
  3. Step 3: Cross multiply
    1,440.46x = 1,988.13 × 916.39
  4. Step 4: Simplify right side
    1,440.46x = 1,821,902.45
  5. Step 5: Solve for x
    x = 1,821,902.45/1,440.46
  6. Step 6: Final answer
    x = 1,264.81

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.