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Finding the Fourth Proportional to 707,711.18, 976,634.63 and 385,426.67

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Solution

The fourth proportional to 707,711.18, 976,634.63 and 385,426.67 is: 531,885.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,711.18 : 976,634.63 = 385,426.67 : x
  2. Step 2: Convert to fraction form
    707,711.18/976,634.63 = 385,426.67/x
  3. Step 3: Cross multiply
    707,711.18x = 976,634.63 × 385,426.67
  4. Step 4: Simplify right side
    707,711.18x = 376,421,026,437.28
  5. Step 5: Solve for x
    x = 376,421,026,437.28/707,711.18
  6. Step 6: Final answer
    x = 531,885.10

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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.