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Finding the Fourth Proportional to 426,400.60, 639,600.90 and 373,869.40

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Solution

The fourth proportional to 426,400.60, 639,600.90 and 373,869.40 is: 560,804.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,400.60 : 639,600.90 = 373,869.40 : x
  2. Step 2: Convert to fraction form
    426,400.60/639,600.90 = 373,869.40/x
  3. Step 3: Cross multiply
    426,400.60x = 639,600.90 × 373,869.40
  4. Step 4: Simplify right side
    426,400.60x = 239,127,204,722.46
  5. Step 5: Solve for x
    x = 239,127,204,722.46/426,400.60
  6. Step 6: Final answer
    x = 560,804.10

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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.