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Finding the Fourth Proportional to 418,992.38, 578,221.56 and 228,017.88

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Solution

The fourth proportional to 418,992.38, 578,221.56 and 228,017.88 is: 314,671.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,992.38 : 578,221.56 = 228,017.88 : x
  2. Step 2: Convert to fraction form
    418,992.38/578,221.56 = 228,017.88/x
  3. Step 3: Cross multiply
    418,992.38x = 578,221.56 × 228,017.88
  4. Step 4: Simplify right side
    418,992.38x = 131,844,854,281.49
  5. Step 5: Solve for x
    x = 131,844,854,281.49/418,992.38
  6. Step 6: Final answer
    x = 314,671.25

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1.5x scale

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.