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Finding the Fourth Proportional to 386,555.30, 578,848.80 and 368,840.60

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Solution

The fourth proportional to 386,555.30, 578,848.80 and 368,840.60 is: 552,321.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,555.30 : 578,848.80 = 368,840.60 : x
  2. Step 2: Convert to fraction form
    386,555.30/578,848.80 = 368,840.60/x
  3. Step 3: Cross multiply
    386,555.30x = 578,848.80 × 368,840.60
  4. Step 4: Simplify right side
    386,555.30x = 213,502,938,701.28
  5. Step 5: Solve for x
    x = 213,502,938,701.28/386,555.30
  6. Step 6: Final answer
    x = 552,321.85

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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.