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Finding the Fourth Proportional to 478,498.05, 717,845.51 and 328,808.84

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Solution

The fourth proportional to 478,498.05, 717,845.51 and 328,808.84 is: 493,280.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,498.05 : 717,845.51 = 328,808.84 : x
  2. Step 2: Convert to fraction form
    478,498.05/717,845.51 = 328,808.84/x
  3. Step 3: Cross multiply
    478,498.05x = 717,845.51 × 328,808.84
  4. Step 4: Simplify right side
    478,498.05x = 236,033,944,209.04
  5. Step 5: Solve for x
    x = 236,033,944,209.04/478,498.05
  6. Step 6: Final answer
    x = 493,280.89

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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.