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Finding the Fourth Proportional to 665,775.88, 918,704.70 and 379,278.88

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Solution

The fourth proportional to 665,775.88, 918,704.70 and 379,278.88 is: 523,367.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,775.88 : 918,704.70 = 379,278.88 : x
  2. Step 2: Convert to fraction form
    665,775.88/918,704.70 = 379,278.88/x
  3. Step 3: Cross multiply
    665,775.88x = 918,704.70 × 379,278.88
  4. Step 4: Simplify right side
    665,775.88x = 348,445,289,666.74
  5. Step 5: Solve for x
    x = 348,445,289,666.74/665,775.88
  6. Step 6: Final answer
    x = 523,367.25

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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.