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Finding the Fourth Proportional to 859,762.90, 1,287,667 and 499,040.38

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Solution

The fourth proportional to 859,762.90, 1,287,667 and 499,040.38 is: 747,412.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,762.90 : 1,287,667 = 499,040.38 : x
  2. Step 2: Convert to fraction form
    859,762.90/1,287,667 = 499,040.38/x
  3. Step 3: Cross multiply
    859,762.90x = 1,287,667 × 499,040.38
  4. Step 4: Simplify right side
    859,762.90x = 642,597,828,993.46
  5. Step 5: Solve for x
    x = 642,597,828,993.46/859,762.90
  6. Step 6: Final answer
    x = 747,412.84

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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.