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Finding the Fourth Proportional to 287,327.71, 430,991.56 and 100,335.07

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Solution

The fourth proportional to 287,327.71, 430,991.56 and 100,335.07 is: 150,502.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,327.71 : 430,991.56 = 100,335.07 : x
  2. Step 2: Convert to fraction form
    287,327.71/430,991.56 = 100,335.07/x
  3. Step 3: Cross multiply
    287,327.71x = 430,991.56 × 100,335.07
  4. Step 4: Simplify right side
    287,327.71x = 43,243,566,187.05
  5. Step 5: Solve for x
    x = 43,243,566,187.05/287,327.71
  6. Step 6: Final answer
    x = 150,502.60

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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.