Home / 287,555.81-396,821.70-156,734.60

Finding the Fourth Proportional to 287,555.81, 396,821.70 and 156,734.60

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Solution

The fourth proportional to 287,555.81, 396,821.70 and 156,734.60 is: 216,290.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,555.81 : 396,821.70 = 156,734.60 : x
  2. Step 2: Convert to fraction form
    287,555.81/396,821.70 = 156,734.60/x
  3. Step 3: Cross multiply
    287,555.81x = 396,821.70 × 156,734.60
  4. Step 4: Simplify right side
    287,555.81x = 62,195,688,436.71
  5. Step 5: Solve for x
    x = 62,195,688,436.71/287,555.81
  6. Step 6: Final answer
    x = 216,290.85

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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.