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Finding the Fourth Proportional to 649,885.40, 974,682.30 and 426,811.40

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Solution

The fourth proportional to 649,885.40, 974,682.30 and 426,811.40 is: 640,121.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,885.40 : 974,682.30 = 426,811.40 : x
  2. Step 2: Convert to fraction form
    649,885.40/974,682.30 = 426,811.40/x
  3. Step 3: Cross multiply
    649,885.40x = 974,682.30 × 426,811.40
  4. Step 4: Simplify right side
    649,885.40x = 416,005,517,018.22
  5. Step 5: Solve for x
    x = 416,005,517,018.22/649,885.40
  6. Step 6: Final answer
    x = 640,121.35

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Double scale
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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.