Home / 478,106.47-659,788.89-287,123.05

Finding the Fourth Proportional to 478,106.47, 659,788.89 and 287,123.05

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Solution

The fourth proportional to 478,106.47, 659,788.89 and 287,123.05 is: 396,230.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,106.47 : 659,788.89 = 287,123.05 : x
  2. Step 2: Convert to fraction form
    478,106.47/659,788.89 = 287,123.05/x
  3. Step 3: Cross multiply
    478,106.47x = 659,788.89 × 287,123.05
  4. Step 4: Simplify right side
    478,106.47x = 189,440,595,153.97
  5. Step 5: Solve for x
    x = 189,440,595,153.97/478,106.47
  6. Step 6: Final answer
    x = 396,230.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.