Home / 278,754.21-384,678.92-151,428.69

Finding the Fourth Proportional to 278,754.21, 384,678.92 and 151,428.69

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Solution

The fourth proportional to 278,754.21, 384,678.92 and 151,428.69 is: 208,970.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,754.21 : 384,678.92 = 151,428.69 : x
  2. Step 2: Convert to fraction form
    278,754.21/384,678.92 = 151,428.69/x
  3. Step 3: Cross multiply
    278,754.21x = 384,678.92 × 151,428.69
  4. Step 4: Simplify right side
    278,754.21x = 58,251,425,304.79
  5. Step 5: Solve for x
    x = 58,251,425,304.79/278,754.21
  6. Step 6: Final answer
    x = 208,970.57

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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.