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Finding the Fourth Proportional to 386,455.90, 579,683.85 and 266,187.10

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Solution

The fourth proportional to 386,455.90, 579,683.85 and 266,187.10 is: 399,280.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,455.90 : 579,683.85 = 266,187.10 : x
  2. Step 2: Convert to fraction form
    386,455.90/579,683.85 = 266,187.10/x
  3. Step 3: Cross multiply
    386,455.90x = 579,683.85 × 266,187.10
  4. Step 4: Simplify right side
    386,455.90x = 154,304,362,948.34
  5. Step 5: Solve for x
    x = 154,304,362,948.34/386,455.90
  6. Step 6: Final answer
    x = 399,280.65

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Similar ratio
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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.