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Finding the Fourth Proportional to 649,868.40, 974,656.80 and 426,794.40

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Solution

The fourth proportional to 649,868.40, 974,656.80 and 426,794.40 is: 640,095.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,868.40 : 974,656.80 = 426,794.40 : x
  2. Step 2: Convert to fraction form
    649,868.40/974,656.80 = 426,794.40/x
  3. Step 3: Cross multiply
    649,868.40x = 974,656.80 × 426,794.40
  4. Step 4: Simplify right side
    649,868.40x = 415,978,064,161.92
  5. Step 5: Solve for x
    x = 415,978,064,161.92/649,868.40
  6. Step 6: Final answer
    x = 640,095.85

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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.