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Finding the Fourth Proportional to 649,764.40, 974,500.80 and 426,690.40

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Solution

The fourth proportional to 649,764.40, 974,500.80 and 426,690.40 is: 639,939.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,764.40 : 974,500.80 = 426,690.40 : x
  2. Step 2: Convert to fraction form
    649,764.40/974,500.80 = 426,690.40/x
  3. Step 3: Cross multiply
    649,764.40x = 974,500.80 × 426,690.40
  4. Step 4: Simplify right side
    649,764.40x = 415,810,136,152.32
  5. Step 5: Solve for x
    x = 415,810,136,152.32/649,764.40
  6. Step 6: Final answer
    x = 639,939.86

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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.