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Finding the Fourth Proportional to 618,318.77, 853,272.02 and 346,381.72

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Solution

The fourth proportional to 618,318.77, 853,272.02 and 346,381.72 is: 478,002.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,318.77 : 853,272.02 = 346,381.72 : x
  2. Step 2: Convert to fraction form
    618,318.77/853,272.02 = 346,381.72/x
  3. Step 3: Cross multiply
    618,318.77x = 853,272.02 × 346,381.72
  4. Step 4: Simplify right side
    618,318.77x = 295,557,828,648.25
  5. Step 5: Solve for x
    x = 295,557,828,648.25/618,318.77
  6. Step 6: Final answer
    x = 478,002.36

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Double scale
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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.