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Finding the Fourth Proportional to 445,869.20, 668,803.80 and 165,328.40

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Solution

The fourth proportional to 445,869.20, 668,803.80 and 165,328.40 is: 247,992.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,869.20 : 668,803.80 = 165,328.40 : x
  2. Step 2: Convert to fraction form
    445,869.20/668,803.80 = 165,328.40/x
  3. Step 3: Cross multiply
    445,869.20x = 668,803.80 × 165,328.40
  4. Step 4: Simplify right side
    445,869.20x = 110,572,262,167.92
  5. Step 5: Solve for x
    x = 110,572,262,167.92/445,869.20
  6. Step 6: Final answer
    x = 247,992.60

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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.