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Finding the Fourth Proportional to 280,694.34, 387,357.30 and 153,370.98

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Solution

The fourth proportional to 280,694.34, 387,357.30 and 153,370.98 is: 211,651.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,694.34 : 387,357.30 = 153,370.98 : x
  2. Step 2: Convert to fraction form
    280,694.34/387,357.30 = 153,370.98/x
  3. Step 3: Cross multiply
    280,694.34x = 387,357.30 × 153,370.98
  4. Step 4: Simplify right side
    280,694.34x = 59,409,368,711.15
  5. Step 5: Solve for x
    x = 59,409,368,711.15/280,694.34
  6. Step 6: Final answer
    x = 211,651.47

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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.