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Finding the Fourth Proportional to 421,486.59, 581,656.08 and 230,495.88

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Solution

The fourth proportional to 421,486.59, 581,656.08 and 230,495.88 is: 318,086.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,486.59 : 581,656.08 = 230,495.88 : x
  2. Step 2: Convert to fraction form
    421,486.59/581,656.08 = 230,495.88/x
  3. Step 3: Cross multiply
    421,486.59x = 581,656.08 × 230,495.88
  4. Step 4: Simplify right side
    421,486.59x = 134,069,330,016.95
  5. Step 5: Solve for x
    x = 134,069,330,016.95/421,486.59
  6. Step 6: Final answer
    x = 318,086.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.