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Finding the Fourth Proportional to 386,142.60, 578,753.10 and 161,502.60

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Solution

The fourth proportional to 386,142.60, 578,753.10 and 161,502.60 is: 242,061.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,142.60 : 578,753.10 = 161,502.60 : x
  2. Step 2: Convert to fraction form
    386,142.60/578,753.10 = 161,502.60/x
  3. Step 3: Cross multiply
    386,142.60x = 578,753.10 × 161,502.60
  4. Step 4: Simplify right side
    386,142.60x = 93,470,130,408.06
  5. Step 5: Solve for x
    x = 93,470,130,408.06/386,142.60
  6. Step 6: Final answer
    x = 242,061.17

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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.