Home / 287,813.20-431,136.60-163,008.40

Finding the Fourth Proportional to 287,813.20, 431,136.60 and 163,008.40

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Solution

The fourth proportional to 287,813.20, 431,136.60 and 163,008.40 is: 244,182.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,813.20 : 431,136.60 = 163,008.40 : x
  2. Step 2: Convert to fraction form
    287,813.20/431,136.60 = 163,008.40/x
  3. Step 3: Cross multiply
    287,813.20x = 431,136.60 × 163,008.40
  4. Step 4: Simplify right side
    287,813.20x = 70,278,887,347.44
  5. Step 5: Solve for x
    x = 70,278,887,347.44/287,813.20
  6. Step 6: Final answer
    x = 244,182.29

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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.