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Finding the Fourth Proportional to 389,607.20, 584,410.80 and 179,655.20

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Solution

The fourth proportional to 389,607.20, 584,410.80 and 179,655.20 is: 269,482.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,607.20 : 584,410.80 = 179,655.20 : x
  2. Step 2: Convert to fraction form
    389,607.20/584,410.80 = 179,655.20/x
  3. Step 3: Cross multiply
    389,607.20x = 584,410.80 × 179,655.20
  4. Step 4: Simplify right side
    389,607.20x = 104,992,439,156.16
  5. Step 5: Solve for x
    x = 104,992,439,156.16/389,607.20
  6. Step 6: Final answer
    x = 269,482.80

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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.