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Finding the Fourth Proportional to 448,429.32, 618,482.40 and 287,299.32

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Solution

The fourth proportional to 448,429.32, 618,482.40 and 287,299.32 is: 396,248.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,429.32 : 618,482.40 = 287,299.32 : x
  2. Step 2: Convert to fraction form
    448,429.32/618,482.40 = 287,299.32/x
  3. Step 3: Cross multiply
    448,429.32x = 618,482.40 × 287,299.32
  4. Step 4: Simplify right side
    448,429.32x = 177,689,572,951.97
  5. Step 5: Solve for x
    x = 177,689,572,951.97/448,429.32
  6. Step 6: Final answer
    x = 396,248.78

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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.