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Finding the Fourth Proportional to 898,290, 1,239,640.20 and 495,884.88

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Solution

The fourth proportional to 898,290, 1,239,640.20 and 495,884.88 is: 684,321.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    898,290 : 1,239,640.20 = 495,884.88 : x
  2. Step 2: Convert to fraction form
    898,290/1,239,640.20 = 495,884.88/x
  3. Step 3: Cross multiply
    898,290x = 1,239,640.20 × 495,884.88
  4. Step 4: Simplify right side
    898,290x = 614,718,831,820.18
  5. Step 5: Solve for x
    x = 614,718,831,820.18/898,290
  6. Step 6: Final answer
    x = 684,321.13

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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.