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Finding the Fourth Proportional to 666,719.60, 919,844.28 and 380,032.88

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Solution

The fourth proportional to 666,719.60, 919,844.28 and 380,032.88 is: 524,314.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,719.60 : 919,844.28 = 380,032.88 : x
  2. Step 2: Convert to fraction form
    666,719.60/919,844.28 = 380,032.88/x
  3. Step 3: Cross multiply
    666,719.60x = 919,844.28 × 380,032.88
  4. Step 4: Simplify right side
    666,719.60x = 349,571,070,879.93
  5. Step 5: Solve for x
    x = 349,571,070,879.93/666,719.60
  6. Step 6: Final answer
    x = 524,314.98

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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.