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Finding the Fourth Proportional to 663,334.40, 915,404.58 and 376,870.22

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Solution

The fourth proportional to 663,334.40, 915,404.58 and 376,870.22 is: 520,082.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,334.40 : 915,404.58 = 376,870.22 : x
  2. Step 2: Convert to fraction form
    663,334.40/915,404.58 = 376,870.22/x
  3. Step 3: Cross multiply
    663,334.40x = 915,404.58 × 376,870.22
  4. Step 4: Simplify right side
    663,334.40x = 344,988,725,453.61
  5. Step 5: Solve for x
    x = 344,988,725,453.61/663,334.40
  6. Step 6: Final answer
    x = 520,082.67

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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.