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Finding the Fourth Proportional to 619,860.81, 929,366.73 and 315,666.12

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Solution

The fourth proportional to 619,860.81, 929,366.73 and 315,666.12 is: 473,283.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,860.81 : 929,366.73 = 315,666.12 : x
  2. Step 2: Convert to fraction form
    619,860.81/929,366.73 = 315,666.12/x
  3. Step 3: Cross multiply
    619,860.81x = 929,366.73 × 315,666.12
  4. Step 4: Simplify right side
    619,860.81x = 293,369,589,716.19
  5. Step 5: Solve for x
    x = 293,369,589,716.19/619,860.81
  6. Step 6: Final answer
    x = 473,283.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.