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Finding the Fourth Proportional to 388,363.92, 535,814.04 and 316,620.60

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Solution

The fourth proportional to 388,363.92, 535,814.04 and 316,620.60 is: 436,831.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,363.92 : 535,814.04 = 316,620.60 : x
  2. Step 2: Convert to fraction form
    388,363.92/535,814.04 = 316,620.60/x
  3. Step 3: Cross multiply
    388,363.92x = 535,814.04 × 316,620.60
  4. Step 4: Simplify right side
    388,363.92x = 169,649,762,833.22
  5. Step 5: Solve for x
    x = 169,649,762,833.22/388,363.92
  6. Step 6: Final answer
    x = 436,831.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.