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Finding the Fourth Proportional to 324,681.80, 487,022.70 and 289,430.60

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Solution

The fourth proportional to 324,681.80, 487,022.70 and 289,430.60 is: 434,145.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,681.80 : 487,022.70 = 289,430.60 : x
  2. Step 2: Convert to fraction form
    324,681.80/487,022.70 = 289,430.60/x
  3. Step 3: Cross multiply
    324,681.80x = 487,022.70 × 289,430.60
  4. Step 4: Simplify right side
    324,681.80x = 140,959,272,274.62
  5. Step 5: Solve for x
    x = 140,959,272,274.62/324,681.80
  6. Step 6: Final answer
    x = 434,145.90

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1.5x scale

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.