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Finding the Fourth Proportional to 448,427.32, 618,448.99 and 378,917.16

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Solution

The fourth proportional to 448,427.32, 618,448.99 and 378,917.16 is: 522,583.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,427.32 : 618,448.99 = 378,917.16 : x
  2. Step 2: Convert to fraction form
    448,427.32/618,448.99 = 378,917.16/x
  3. Step 3: Cross multiply
    448,427.32x = 618,448.99 × 378,917.16
  4. Step 4: Simplify right side
    448,427.32x = 234,340,934,895.67
  5. Step 5: Solve for x
    x = 234,340,934,895.67/448,427.32
  6. Step 6: Final answer
    x = 522,583.98

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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.