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Finding the Fourth Proportional to 287,237.80, 430,856.70 and 162,821.80

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Solution

The fourth proportional to 287,237.80, 430,856.70 and 162,821.80 is: 244,232.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,237.80 : 430,856.70 = 162,821.80 : x
  2. Step 2: Convert to fraction form
    287,237.80/430,856.70 = 162,821.80/x
  3. Step 3: Cross multiply
    287,237.80x = 430,856.70 × 162,821.80
  4. Step 4: Simplify right side
    287,237.80x = 70,152,863,436.06
  5. Step 5: Solve for x
    x = 70,152,863,436.06/287,237.80
  6. Step 6: Final answer
    x = 244,232.70

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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.