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Finding the Fourth Proportional to 287,386.65, 396,605.76 and 160,062.21

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Solution

The fourth proportional to 287,386.65, 396,605.76 and 160,062.21 is: 220,892.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,386.65 : 396,605.76 = 160,062.21 : x
  2. Step 2: Convert to fraction form
    287,386.65/396,605.76 = 160,062.21/x
  3. Step 3: Cross multiply
    287,386.65x = 396,605.76 × 160,062.21
  4. Step 4: Simplify right side
    287,386.65x = 63,481,594,444.33
  5. Step 5: Solve for x
    x = 63,481,594,444.33/287,386.65
  6. Step 6: Final answer
    x = 220,892.64

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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.