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Finding the Fourth Proportional to 707,889, 976,895.40 and 385,601.76

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Solution

The fourth proportional to 707,889, 976,895.40 and 385,601.76 is: 532,135.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,889 : 976,895.40 = 385,601.76 : x
  2. Step 2: Convert to fraction form
    707,889/976,895.40 = 385,601.76/x
  3. Step 3: Cross multiply
    707,889x = 976,895.40 × 385,601.76
  4. Step 4: Simplify right side
    707,889x = 376,692,585,575.90
  5. Step 5: Solve for x
    x = 376,692,585,575.90/707,889
  6. Step 6: Final answer
    x = 532,135.10

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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.