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Finding the Fourth Proportional to 280,391.76, 386,947.26 and 153,068.31

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Solution

The fourth proportional to 280,391.76, 386,947.26 and 153,068.31 is: 211,237.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,391.76 : 386,947.26 = 153,068.31 : x
  2. Step 2: Convert to fraction form
    280,391.76/386,947.26 = 153,068.31/x
  3. Step 3: Cross multiply
    280,391.76x = 386,947.26 × 153,068.31
  4. Step 4: Simplify right side
    280,391.76x = 59,229,363,147.33
  5. Step 5: Solve for x
    x = 59,229,363,147.33/280,391.76
  6. Step 6: Final answer
    x = 211,237.89

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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.