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Finding the Fourth Proportional to 565,556.80, 780,456.72 and 339,275.20

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Solution

The fourth proportional to 565,556.80, 780,456.72 and 339,275.20 is: 468,192.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,556.80 : 780,456.72 = 339,275.20 : x
  2. Step 2: Convert to fraction form
    565,556.80/780,456.72 = 339,275.20/x
  3. Step 3: Cross multiply
    565,556.80x = 780,456.72 × 339,275.20
  4. Step 4: Simplify right side
    565,556.80x = 264,789,609,769.34
  5. Step 5: Solve for x
    x = 264,789,609,769.34/565,556.80
  6. Step 6: Final answer
    x = 468,192.78

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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.