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Finding the Fourth Proportional to 561,868.15, 775,428.70 and 320,228.57

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Solution

The fourth proportional to 561,868.15, 775,428.70 and 320,228.57 is: 441,944.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,868.15 : 775,428.70 = 320,228.57 : x
  2. Step 2: Convert to fraction form
    561,868.15/775,428.70 = 320,228.57/x
  3. Step 3: Cross multiply
    561,868.15x = 775,428.70 × 320,228.57
  4. Step 4: Simplify right side
    561,868.15x = 248,314,424,065.87
  5. Step 5: Solve for x
    x = 248,314,424,065.87/561,868.15
  6. Step 6: Final answer
    x = 441,944.30

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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.