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Finding the Fourth Proportional to 287,671.04, 396,999.48 and 160,347.56

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Solution

The fourth proportional to 287,671.04, 396,999.48 and 160,347.56 is: 221,287.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,671.04 : 396,999.48 = 160,347.56 : x
  2. Step 2: Convert to fraction form
    287,671.04/396,999.48 = 160,347.56/x
  3. Step 3: Cross multiply
    287,671.04x = 396,999.48 × 160,347.56
  4. Step 4: Simplify right side
    287,671.04x = 63,657,897,939.27
  5. Step 5: Solve for x
    x = 63,657,897,939.27/287,671.04
  6. Step 6: Final answer
    x = 221,287.13

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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.