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Finding the Fourth Proportional to 587,075.20, 879,446.40 and 320,358.40

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Solution

The fourth proportional to 587,075.20, 879,446.40 and 320,358.40 is: 479,901.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,075.20 : 879,446.40 = 320,358.40 : x
  2. Step 2: Convert to fraction form
    587,075.20/879,446.40 = 320,358.40/x
  3. Step 3: Cross multiply
    587,075.20x = 879,446.40 × 320,358.40
  4. Step 4: Simplify right side
    587,075.20x = 281,738,041,589.76
  5. Step 5: Solve for x
    x = 281,738,041,589.76/587,075.20
  6. Step 6: Final answer
    x = 479,901.11

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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.