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Finding the Fourth Proportional to 605,005.60, 907,508.40 and 394,880.80

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Solution

The fourth proportional to 605,005.60, 907,508.40 and 394,880.80 is: 592,321.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,005.60 : 907,508.40 = 394,880.80 : x
  2. Step 2: Convert to fraction form
    605,005.60/907,508.40 = 394,880.80/x
  3. Step 3: Cross multiply
    605,005.60x = 907,508.40 × 394,880.80
  4. Step 4: Simplify right side
    605,005.60x = 358,357,642,998.72
  5. Step 5: Solve for x
    x = 358,357,642,998.72/605,005.60
  6. Step 6: Final answer
    x = 592,321.20

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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.