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Finding the Fourth Proportional to 388,876.32, 583,327.08 and 122,639.40

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Solution

The fourth proportional to 388,876.32, 583,327.08 and 122,639.40 is: 183,963.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,876.32 : 583,327.08 = 122,639.40 : x
  2. Step 2: Convert to fraction form
    388,876.32/583,327.08 = 122,639.40/x
  3. Step 3: Cross multiply
    388,876.32x = 583,327.08 × 122,639.40
  4. Step 4: Simplify right side
    388,876.32x = 71,538,883,094.95
  5. Step 5: Solve for x
    x = 71,538,883,094.95/388,876.32
  6. Step 6: Final answer
    x = 183,963.07

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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.