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Finding the Fourth Proportional to 565,422.69, 780,289.34 and 307,299.63

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Solution

The fourth proportional to 565,422.69, 780,289.34 and 307,299.63 is: 424,076.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,422.69 : 780,289.34 = 307,299.63 : x
  2. Step 2: Convert to fraction form
    565,422.69/780,289.34 = 307,299.63/x
  3. Step 3: Cross multiply
    565,422.69x = 780,289.34 × 307,299.63
  4. Step 4: Simplify right side
    565,422.69x = 239,782,623,938.45
  5. Step 5: Solve for x
    x = 239,782,623,938.45/565,422.69
  6. Step 6: Final answer
    x = 424,076.76

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Double scale
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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.