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Finding the Fourth Proportional to 561,918.47, 775,435.68 and 307,269.45

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Solution

The fourth proportional to 561,918.47, 775,435.68 and 307,269.45 is: 424,025.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,918.47 : 775,435.68 = 307,269.45 : x
  2. Step 2: Convert to fraction form
    561,918.47/775,435.68 = 307,269.45/x
  3. Step 3: Cross multiply
    561,918.47x = 775,435.68 × 307,269.45
  4. Step 4: Simplify right side
    561,918.47x = 238,267,694,903.98
  5. Step 5: Solve for x
    x = 238,267,694,903.98/561,918.47
  6. Step 6: Final answer
    x = 424,025.39

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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.