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Finding the Fourth Proportional to 379,543.86, 523,771.02 and 218,395.71

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Solution

The fourth proportional to 379,543.86, 523,771.02 and 218,395.71 is: 301,386.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,543.86 : 523,771.02 = 218,395.71 : x
  2. Step 2: Convert to fraction form
    379,543.86/523,771.02 = 218,395.71/x
  3. Step 3: Cross multiply
    379,543.86x = 523,771.02 × 218,395.71
  4. Step 4: Simplify right side
    379,543.86x = 114,389,343,790.32
  5. Step 5: Solve for x
    x = 114,389,343,790.32/379,543.86
  6. Step 6: Final answer
    x = 301,386.36

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1.5x scale

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.