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Finding the Fourth Proportional to 422,981.85, 583,854.54 and 378,141.52

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Solution

The fourth proportional to 422,981.85, 583,854.54 and 378,141.52 is: 521,960.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,981.85 : 583,854.54 = 378,141.52 : x
  2. Step 2: Convert to fraction form
    422,981.85/583,854.54 = 378,141.52/x
  3. Step 3: Cross multiply
    422,981.85x = 583,854.54 × 378,141.52
  4. Step 4: Simplify right side
    422,981.85x = 220,779,641,323.79
  5. Step 5: Solve for x
    x = 220,779,641,323.79/422,981.85
  6. Step 6: Final answer
    x = 521,960.08

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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.