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Finding the Fourth Proportional to 666,246.32, 919,443.72 and 379,720.16

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Solution

The fourth proportional to 666,246.32, 919,443.72 and 379,720.16 is: 524,027.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,246.32 : 919,443.72 = 379,720.16 : x
  2. Step 2: Convert to fraction form
    666,246.32/919,443.72 = 379,720.16/x
  3. Step 3: Cross multiply
    666,246.32x = 919,443.72 × 379,720.16
  4. Step 4: Simplify right side
    666,246.32x = 349,131,316,469.40
  5. Step 5: Solve for x
    x = 349,131,316,469.40/666,246.32
  6. Step 6: Final answer
    x = 524,027.38

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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.