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Finding the Fourth Proportional to 280,071.88, 386,487.48 and 152,739.88

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Solution

The fourth proportional to 280,071.88, 386,487.48 and 152,739.88 is: 210,774.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,071.88 : 386,487.48 = 152,739.88 : x
  2. Step 2: Convert to fraction form
    280,071.88/386,487.48 = 152,739.88/x
  3. Step 3: Cross multiply
    280,071.88x = 386,487.48 × 152,739.88
  4. Step 4: Simplify right side
    280,071.88x = 59,032,050,923.26
  5. Step 5: Solve for x
    x = 59,032,050,923.26/280,071.88
  6. Step 6: Final answer
    x = 210,774.65

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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.