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Finding the Fourth Proportional to 384,878.80, 577,331.40 and 118,637.20

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Solution

The fourth proportional to 384,878.80, 577,331.40 and 118,637.20 is: 177,959.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,878.80 : 577,331.40 = 118,637.20 : x
  2. Step 2: Convert to fraction form
    384,878.80/577,331.40 = 118,637.20/x
  3. Step 3: Cross multiply
    384,878.80x = 577,331.40 × 118,637.20
  4. Step 4: Simplify right side
    384,878.80x = 68,492,980,768.08
  5. Step 5: Solve for x
    x = 68,492,980,768.08/384,878.80
  6. Step 6: Final answer
    x = 177,959.87

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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.