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Finding the Fourth Proportional to 478,061.20, 717,091.80 and 401,078.80

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Solution

The fourth proportional to 478,061.20, 717,091.80 and 401,078.80 is: 601,618.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,061.20 : 717,091.80 = 401,078.80 : x
  2. Step 2: Convert to fraction form
    478,061.20/717,091.80 = 401,078.80/x
  3. Step 3: Cross multiply
    478,061.20x = 717,091.80 × 401,078.80
  4. Step 4: Simplify right side
    478,061.20x = 287,610,318,633.84
  5. Step 5: Solve for x
    x = 287,610,318,633.84/478,061.20
  6. Step 6: Final answer
    x = 601,618.20

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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.