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Finding the Fourth Proportional to 342,421.75, 472,543.64 and 191,518.75

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Solution

The fourth proportional to 342,421.75, 472,543.64 and 191,518.75 is: 264,296.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,421.75 : 472,543.64 = 191,518.75 : x
  2. Step 2: Convert to fraction form
    342,421.75/472,543.64 = 191,518.75/x
  3. Step 3: Cross multiply
    342,421.75x = 472,543.64 × 191,518.75
  4. Step 4: Simplify right side
    342,421.75x = 90,500,967,253.25
  5. Step 5: Solve for x
    x = 90,500,967,253.25/342,421.75
  6. Step 6: Final answer
    x = 264,296.78

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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.