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Finding the Fourth Proportional to 278,698.68, 384,605.28 and 151,376.40

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Solution

The fourth proportional to 278,698.68, 384,605.28 and 151,376.40 is: 208,900.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,698.68 : 384,605.28 = 151,376.40 : x
  2. Step 2: Convert to fraction form
    278,698.68/384,605.28 = 151,376.40/x
  3. Step 3: Cross multiply
    278,698.68x = 384,605.28 × 151,376.40
  4. Step 4: Simplify right side
    278,698.68x = 58,220,162,707.39
  5. Step 5: Solve for x
    x = 58,220,162,707.39/278,698.68
  6. Step 6: Final answer
    x = 208,900.03

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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.