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Finding the Fourth Proportional to 287,237.40, 430,856.10 and 162,821.40

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Solution

The fourth proportional to 287,237.40, 430,856.10 and 162,821.40 is: 244,232.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,237.40 : 430,856.10 = 162,821.40 : x
  2. Step 2: Convert to fraction form
    287,237.40/430,856.10 = 162,821.40/x
  3. Step 3: Cross multiply
    287,237.40x = 430,856.10 × 162,821.40
  4. Step 4: Simplify right side
    287,237.40x = 70,152,593,400.54
  5. Step 5: Solve for x
    x = 70,152,593,400.54/287,237.40
  6. Step 6: Final answer
    x = 244,232.10

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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.