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Finding the Fourth Proportional to 256,949.80, 385,424.70 and 162,471.40

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Solution

The fourth proportional to 256,949.80, 385,424.70 and 162,471.40 is: 243,707.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,949.80 : 385,424.70 = 162,471.40 : x
  2. Step 2: Convert to fraction form
    256,949.80/385,424.70 = 162,471.40/x
  3. Step 3: Cross multiply
    256,949.80x = 385,424.70 × 162,471.40
  4. Step 4: Simplify right side
    256,949.80x = 62,620,490,603.58
  5. Step 5: Solve for x
    x = 62,620,490,603.58/256,949.80
  6. Step 6: Final answer
    x = 243,707.10

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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.