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Finding the Fourth Proportional to 448,860.64, 619,427.43 and 287,715.57

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Solution

The fourth proportional to 448,860.64, 619,427.43 and 287,715.57 is: 397,047.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,860.64 : 619,427.43 = 287,715.57 : x
  2. Step 2: Convert to fraction form
    448,860.64/619,427.43 = 287,715.57/x
  3. Step 3: Cross multiply
    448,860.64x = 619,427.43 × 287,715.57
  4. Step 4: Simplify right side
    448,860.64x = 178,218,914,706.17
  5. Step 5: Solve for x
    x = 178,218,914,706.17/448,860.64
  6. Step 6: Final answer
    x = 397,047.32

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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.