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Finding the Fourth Proportional to 666,729.60, 919,858.08 and 380,042.88

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Solution

The fourth proportional to 666,729.60, 919,858.08 and 380,042.88 is: 524,328.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,729.60 : 919,858.08 = 380,042.88 : x
  2. Step 2: Convert to fraction form
    666,729.60/919,858.08 = 380,042.88/x
  3. Step 3: Cross multiply
    666,729.60x = 919,858.08 × 380,042.88
  4. Step 4: Simplify right side
    666,729.60x = 349,585,513,914.47
  5. Step 5: Solve for x
    x = 349,585,513,914.47/666,729.60
  6. Step 6: Final answer
    x = 524,328.77

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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.