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Finding the Fourth Proportional to 448,624.96, 618,946.12 and 287,568.82

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Solution

The fourth proportional to 448,624.96, 618,946.12 and 287,568.82 is: 396,744.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,624.96 : 618,946.12 = 287,568.82 : x
  2. Step 2: Convert to fraction form
    448,624.96/618,946.12 = 287,568.82/x
  3. Step 3: Cross multiply
    448,624.96x = 618,946.12 × 287,568.82
  4. Step 4: Simplify right side
    448,624.96x = 177,989,605,371.98
  5. Step 5: Solve for x
    x = 177,989,605,371.98/448,624.96
  6. Step 6: Final answer
    x = 396,744.77

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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.