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Finding the Fourth Proportional to 693,355.88, 957,125.81 and 421,510.61

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Solution

The fourth proportional to 693,355.88, 957,125.81 and 421,510.61 is: 581,863.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,355.88 : 957,125.81 = 421,510.61 : x
  2. Step 2: Convert to fraction form
    693,355.88/957,125.81 = 421,510.61/x
  3. Step 3: Cross multiply
    693,355.88x = 957,125.81 × 421,510.61
  4. Step 4: Simplify right side
    693,355.88x = 403,438,684,019.84
  5. Step 5: Solve for x
    x = 403,438,684,019.84/693,355.88
  6. Step 6: Final answer
    x = 581,863.80

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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.