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Finding the Fourth Proportional to 649,886.40, 974,683.80 and 426,812.40

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Solution

The fourth proportional to 649,886.40, 974,683.80 and 426,812.40 is: 640,122.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,886.40 : 974,683.80 = 426,812.40 : x
  2. Step 2: Convert to fraction form
    649,886.40/974,683.80 = 426,812.40/x
  3. Step 3: Cross multiply
    649,886.40x = 974,683.80 × 426,812.40
  4. Step 4: Simplify right side
    649,886.40x = 416,007,131,919.12
  5. Step 5: Solve for x
    x = 416,007,131,919.12/649,886.40
  6. Step 6: Final answer
    x = 640,122.85

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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.