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Finding the Fourth Proportional to 421,607.28, 581,654.64 and 268,618.08

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Solution

The fourth proportional to 421,607.28, 581,654.64 and 268,618.08 is: 370,588.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,607.28 : 581,654.64 = 268,618.08 : x
  2. Step 2: Convert to fraction form
    421,607.28/581,654.64 = 268,618.08/x
  3. Step 3: Cross multiply
    421,607.28x = 581,654.64 × 268,618.08
  4. Step 4: Simplify right side
    421,607.28x = 156,242,952,619.89
  5. Step 5: Solve for x
    x = 156,242,952,619.89/421,607.28
  6. Step 6: Final answer
    x = 370,588.84

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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.