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Finding the Fourth Proportional to 667,389.28, 921,014.96 and 376,977.76

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Solution

The fourth proportional to 667,389.28, 921,014.96 and 376,977.76 is: 520,239.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,389.28 : 921,014.96 = 376,977.76 : x
  2. Step 2: Convert to fraction form
    667,389.28/921,014.96 = 376,977.76/x
  3. Step 3: Cross multiply
    667,389.28x = 921,014.96 × 376,977.76
  4. Step 4: Simplify right side
    667,389.28x = 347,202,156,547.29
  5. Step 5: Solve for x
    x = 347,202,156,547.29/667,389.28
  6. Step 6: Final answer
    x = 520,239.34

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1.5x scale

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.