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Finding the Fourth Proportional to 587,037.20, 879,389.40 and 320,320.40

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Solution

The fourth proportional to 587,037.20, 879,389.40 and 320,320.40 is: 479,844.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,037.20 : 879,389.40 = 320,320.40 : x
  2. Step 2: Convert to fraction form
    587,037.20/879,389.40 = 320,320.40/x
  3. Step 3: Cross multiply
    587,037.20x = 879,389.40 × 320,320.40
  4. Step 4: Simplify right side
    587,037.20x = 281,686,364,363.76
  5. Step 5: Solve for x
    x = 281,686,364,363.76/587,037.20
  6. Step 6: Final answer
    x = 479,844.15

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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.