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Finding the Fourth Proportional to 666,597.26, 919,900.28 and 380,111.20

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Solution

The fourth proportional to 666,597.26, 919,900.28 and 380,111.20 is: 524,551.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,597.26 : 919,900.28 = 380,111.20 : x
  2. Step 2: Convert to fraction form
    666,597.26/919,900.28 = 380,111.20/x
  3. Step 3: Cross multiply
    666,597.26x = 919,900.28 × 380,111.20
  4. Step 4: Simplify right side
    666,597.26x = 349,664,399,311.14
  5. Step 5: Solve for x
    x = 349,664,399,311.14/666,597.26
  6. Step 6: Final answer
    x = 524,551.21

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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.