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Finding the Fourth Proportional to 618,391.72, 853,470.78 and 346,478.08

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Solution

The fourth proportional to 618,391.72, 853,470.78 and 346,478.08 is: 478,190.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,391.72 : 853,470.78 = 346,478.08 : x
  2. Step 2: Convert to fraction form
    618,391.72/853,470.78 = 346,478.08/x
  3. Step 3: Cross multiply
    618,391.72x = 853,470.78 × 346,478.08
  4. Step 4: Simplify right side
    618,391.72x = 295,708,917,190.50
  5. Step 5: Solve for x
    x = 295,708,917,190.50/618,391.72
  6. Step 6: Final answer
    x = 478,190.29

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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.