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Finding the Fourth Proportional to 707,289.18, 976,071.51 and 385,008.54

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Solution

The fourth proportional to 707,289.18, 976,071.51 and 385,008.54 is: 531,318.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,289.18 : 976,071.51 = 385,008.54 : x
  2. Step 2: Convert to fraction form
    707,289.18/976,071.51 = 385,008.54/x
  3. Step 3: Cross multiply
    707,289.18x = 976,071.51 × 385,008.54
  4. Step 4: Simplify right side
    707,289.18x = 375,795,867,000.70
  5. Step 5: Solve for x
    x = 375,795,867,000.70/707,289.18
  6. Step 6: Final answer
    x = 531,318.56

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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.