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Finding the Fourth Proportional to 590,928.80, 885,356.40 and 485,175.20

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Solution

The fourth proportional to 590,928.80, 885,356.40 and 485,175.20 is: 726,911.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    590,928.80 : 885,356.40 = 485,175.20 : x
  2. Step 2: Convert to fraction form
    590,928.80/885,356.40 = 485,175.20/x
  3. Step 3: Cross multiply
    590,928.80x = 885,356.40 × 485,175.20
  4. Step 4: Simplify right side
    590,928.80x = 429,552,968,441.28
  5. Step 5: Solve for x
    x = 429,552,968,441.28/590,928.80
  6. Step 6: Final answer
    x = 726,911.55

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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.