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Finding the Fourth Proportional to 388,885.91, 583,328.88 and 122,667.21

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Solution

The fourth proportional to 388,885.91, 583,328.88 and 122,667.21 is: 184,000.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,885.91 : 583,328.88 = 122,667.21 : x
  2. Step 2: Convert to fraction form
    388,885.91/583,328.88 = 122,667.21/x
  3. Step 3: Cross multiply
    388,885.91x = 583,328.88 × 122,667.21
  4. Step 4: Simplify right side
    388,885.91x = 71,555,326,222.02
  5. Step 5: Solve for x
    x = 71,555,326,222.02/388,885.91
  6. Step 6: Final answer
    x = 184,000.82

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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.