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Finding the Fourth Proportional to 262,443.20, 393,664.80 and 155,998.40

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Solution

The fourth proportional to 262,443.20, 393,664.80 and 155,998.40 is: 233,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,443.20 : 393,664.80 = 155,998.40 : x
  2. Step 2: Convert to fraction form
    262,443.20/393,664.80 = 155,998.40/x
  3. Step 3: Cross multiply
    262,443.20x = 393,664.80 × 155,998.40
  4. Step 4: Simplify right side
    262,443.20x = 61,411,078,936.32
  5. Step 5: Solve for x
    x = 61,411,078,936.32/262,443.20
  6. Step 6: Final answer
    x = 233,997.60

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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.