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Finding the Fourth Proportional to 391,364.78, 540,073.71 and 219,289.82

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Solution

The fourth proportional to 391,364.78, 540,073.71 and 219,289.82 is: 302,614.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,364.78 : 540,073.71 = 219,289.82 : x
  2. Step 2: Convert to fraction form
    391,364.78/540,073.71 = 219,289.82/x
  3. Step 3: Cross multiply
    391,364.78x = 540,073.71 × 219,289.82
  4. Step 4: Simplify right side
    391,364.78x = 118,432,663,952.26
  5. Step 5: Solve for x
    x = 118,432,663,952.26/391,364.78
  6. Step 6: Final answer
    x = 302,614.52

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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.