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Finding the Fourth Proportional to 528,095.90, 792,143.85 and 388,127.90

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Solution

The fourth proportional to 528,095.90, 792,143.85 and 388,127.90 is: 582,191.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,095.90 : 792,143.85 = 388,127.90 : x
  2. Step 2: Convert to fraction form
    528,095.90/792,143.85 = 388,127.90/x
  3. Step 3: Cross multiply
    528,095.90x = 792,143.85 × 388,127.90
  4. Step 4: Simplify right side
    528,095.90x = 307,453,128,998.42
  5. Step 5: Solve for x
    x = 307,453,128,998.42/528,095.90
  6. Step 6: Final answer
    x = 582,191.85

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Similar ratio
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1.5x scale

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.