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Finding the Fourth Proportional to 587,205.20, 879,641.40 and 320,488.40

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Solution

The fourth proportional to 587,205.20, 879,641.40 and 320,488.40 is: 480,096.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,205.20 : 879,641.40 = 320,488.40 : x
  2. Step 2: Convert to fraction form
    587,205.20/879,641.40 = 320,488.40/x
  3. Step 3: Cross multiply
    587,205.20x = 879,641.40 × 320,488.40
  4. Step 4: Simplify right side
    587,205.20x = 281,914,864,859.76
  5. Step 5: Solve for x
    x = 281,914,864,859.76/587,205.20
  6. Step 6: Final answer
    x = 480,096.00

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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.