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Finding the Fourth Proportional to 578,728.80, 868,136.40 and 204,703.20

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Solution

The fourth proportional to 578,728.80, 868,136.40 and 204,703.20 is: 307,070.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,728.80 : 868,136.40 = 204,703.20 : x
  2. Step 2: Convert to fraction form
    578,728.80/868,136.40 = 204,703.20/x
  3. Step 3: Cross multiply
    578,728.80x = 868,136.40 × 204,703.20
  4. Step 4: Simplify right side
    578,728.80x = 177,710,299,116.48
  5. Step 5: Solve for x
    x = 177,710,299,116.48/578,728.80
  6. Step 6: Final answer
    x = 307,070.08

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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.