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Finding the Fourth Proportional to 386,558.47, 579,278.10 and 266,492.17

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Solution

The fourth proportional to 386,558.47, 579,278.10 and 266,492.17 is: 399,352.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,558.47 : 579,278.10 = 266,492.17 : x
  2. Step 2: Convert to fraction form
    386,558.47/579,278.10 = 266,492.17/x
  3. Step 3: Cross multiply
    386,558.47x = 579,278.10 × 266,492.17
  4. Step 4: Simplify right side
    386,558.47x = 154,373,077,902.48
  5. Step 5: Solve for x
    x = 154,373,077,902.48/386,558.47
  6. Step 6: Final answer
    x = 399,352.47

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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.