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Finding the Fourth Proportional to 691,315.70, 954,019.62 and 385,411.50

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Solution

The fourth proportional to 691,315.70, 954,019.62 and 385,411.50 is: 531,870.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,315.70 : 954,019.62 = 385,411.50 : x
  2. Step 2: Convert to fraction form
    691,315.70/954,019.62 = 385,411.50/x
  3. Step 3: Cross multiply
    691,315.70x = 954,019.62 × 385,411.50
  4. Step 4: Simplify right side
    691,315.70x = 367,690,132,773.63
  5. Step 5: Solve for x
    x = 367,690,132,773.63/691,315.70
  6. Step 6: Final answer
    x = 531,870.08

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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.