Home / 920,862.20-1,381,293.30-289,969.40

Finding the Fourth Proportional to 920,862.20, 1,381,293.30 and 289,969.40

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Solution

The fourth proportional to 920,862.20, 1,381,293.30 and 289,969.40 is: 434,954.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,862.20 : 1,381,293.30 = 289,969.40 : x
  2. Step 2: Convert to fraction form
    920,862.20/1,381,293.30 = 289,969.40/x
  3. Step 3: Cross multiply
    920,862.20x = 1,381,293.30 × 289,969.40
  4. Step 4: Simplify right side
    920,862.20x = 400,532,789,425.02
  5. Step 5: Solve for x
    x = 400,532,789,425.02/920,862.20
  6. Step 6: Final answer
    x = 434,954.10

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Double scale
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Similar ratio
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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.