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Finding the Fourth Proportional to 445,907.20, 668,860.80 and 400,806.40

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Solution

The fourth proportional to 445,907.20, 668,860.80 and 400,806.40 is: 601,209.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,907.20 : 668,860.80 = 400,806.40 : x
  2. Step 2: Convert to fraction form
    445,907.20/668,860.80 = 400,806.40/x
  3. Step 3: Cross multiply
    445,907.20x = 668,860.80 × 400,806.40
  4. Step 4: Simplify right side
    445,907.20x = 268,083,689,349.12
  5. Step 5: Solve for x
    x = 268,083,689,349.12/445,907.20
  6. Step 6: Final answer
    x = 601,209.60

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Similar ratio
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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.