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Finding the Fourth Proportional to 386,572.30, 578,874.30 and 368,857.60

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Solution

The fourth proportional to 386,572.30, 578,874.30 and 368,857.60 is: 552,347.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,572.30 : 578,874.30 = 368,857.60 : x
  2. Step 2: Convert to fraction form
    386,572.30/578,874.30 = 368,857.60/x
  3. Step 3: Cross multiply
    386,572.30x = 578,874.30 × 368,857.60
  4. Step 4: Simplify right side
    386,572.30x = 213,522,184,999.68
  5. Step 5: Solve for x
    x = 213,522,184,999.68/386,572.30
  6. Step 6: Final answer
    x = 552,347.35

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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.