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Finding the Fourth Proportional to 879,252.80, 1,318,879.20 and 520,001.60

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Solution

The fourth proportional to 879,252.80, 1,318,879.20 and 520,001.60 is: 780,002.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,252.80 : 1,318,879.20 = 520,001.60 : x
  2. Step 2: Convert to fraction form
    879,252.80/1,318,879.20 = 520,001.60/x
  3. Step 3: Cross multiply
    879,252.80x = 1,318,879.20 × 520,001.60
  4. Step 4: Simplify right side
    879,252.80x = 685,819,294,206.72
  5. Step 5: Solve for x
    x = 685,819,294,206.72/879,252.80
  6. Step 6: Final answer
    x = 780,002.40

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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.