Home / 728,479.08-1,090,657.98-386,142.48

Finding the Fourth Proportional to 728,479.08, 1,090,657.98 and 386,142.48

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Solution

The fourth proportional to 728,479.08, 1,090,657.98 and 386,142.48 is: 578,121.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,479.08 : 1,090,657.98 = 386,142.48 : x
  2. Step 2: Convert to fraction form
    728,479.08/1,090,657.98 = 386,142.48/x
  3. Step 3: Cross multiply
    728,479.08x = 1,090,657.98 × 386,142.48
  4. Step 4: Simplify right side
    728,479.08x = 421,149,377,228.99
  5. Step 5: Solve for x
    x = 421,149,377,228.99/728,479.08
  6. Step 6: Final answer
    x = 578,121.44

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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.