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Finding the Fourth Proportional to 561,409.40, 840,605.06 and 427,652.48

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Solution

The fourth proportional to 561,409.40, 840,605.06 and 427,652.48 is: 640,329.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,409.40 : 840,605.06 = 427,652.48 : x
  2. Step 2: Convert to fraction form
    561,409.40/840,605.06 = 427,652.48/x
  3. Step 3: Cross multiply
    561,409.40x = 840,605.06 × 427,652.48
  4. Step 4: Simplify right side
    561,409.40x = 359,486,841,780.19
  5. Step 5: Solve for x
    x = 359,486,841,780.19/561,409.40
  6. Step 6: Final answer
    x = 640,329.21

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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.