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Finding the Fourth Proportional to 280,466.91, 387,042.80 and 153,141.59

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Solution

The fourth proportional to 280,466.91, 387,042.80 and 153,141.59 is: 211,334.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,466.91 : 387,042.80 = 153,141.59 : x
  2. Step 2: Convert to fraction form
    280,466.91/387,042.80 = 153,141.59/x
  3. Step 3: Cross multiply
    280,466.91x = 387,042.80 × 153,141.59
  4. Step 4: Simplify right side
    280,466.91x = 59,272,349,991.95
  5. Step 5: Solve for x
    x = 59,272,349,991.95/280,466.91
  6. Step 6: Final answer
    x = 211,334.56

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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.