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Finding the Fourth Proportional to 287,254.50, 430,978.79 and 127,308.56

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Solution

The fourth proportional to 287,254.50, 430,978.79 and 127,308.56 is: 191,005.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,254.50 : 430,978.79 = 127,308.56 : x
  2. Step 2: Convert to fraction form
    287,254.50/430,978.79 = 127,308.56/x
  3. Step 3: Cross multiply
    287,254.50x = 430,978.79 × 127,308.56
  4. Step 4: Simplify right side
    287,254.50x = 54,867,287,308.82
  5. Step 5: Solve for x
    x = 54,867,287,308.82/287,254.50
  6. Step 6: Final answer
    x = 191,005.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.