Home / 278,780.90-384,717.65-151,456.50

Finding the Fourth Proportional to 278,780.90, 384,717.65 and 151,456.50

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Solution

The fourth proportional to 278,780.90, 384,717.65 and 151,456.50 is: 209,009.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,780.90 : 384,717.65 = 151,456.50 : x
  2. Step 2: Convert to fraction form
    278,780.90/384,717.65 = 151,456.50/x
  3. Step 3: Cross multiply
    278,780.90x = 384,717.65 × 151,456.50
  4. Step 4: Simplify right side
    278,780.90x = 58,267,987,999.94
  5. Step 5: Solve for x
    x = 58,267,987,999.94/278,780.90
  6. Step 6: Final answer
    x = 209,009.98

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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.