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Finding the Fourth Proportional to 666,117.46, 919,219.35 and 379,729.81

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Solution

The fourth proportional to 666,117.46, 919,219.35 and 379,729.81 is: 524,014.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,117.46 : 919,219.35 = 379,729.81 : x
  2. Step 2: Convert to fraction form
    666,117.46/919,219.35 = 379,729.81/x
  3. Step 3: Cross multiply
    666,117.46x = 919,219.35 × 379,729.81
  4. Step 4: Simplify right side
    666,117.46x = 349,054,989,123.82
  5. Step 5: Solve for x
    x = 349,054,989,123.82/666,117.46
  6. Step 6: Final answer
    x = 524,014.17

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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.