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Finding the Fourth Proportional to 666,304.81, 919,500.80 and 375,978.01

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Solution

The fourth proportional to 666,304.81, 919,500.80 and 375,978.01 is: 518,849.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,304.81 : 919,500.80 = 375,978.01 : x
  2. Step 2: Convert to fraction form
    666,304.81/919,500.80 = 375,978.01/x
  3. Step 3: Cross multiply
    666,304.81x = 919,500.80 × 375,978.01
  4. Step 4: Simplify right side
    666,304.81x = 345,712,080,977.41
  5. Step 5: Solve for x
    x = 345,712,080,977.41/666,304.81
  6. Step 6: Final answer
    x = 518,849.75

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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.