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Finding the Fourth Proportional to 639,495.79, 958,410.72 and 259,973.21

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Solution

The fourth proportional to 639,495.79, 958,410.72 and 259,973.21 is: 389,621.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,495.79 : 958,410.72 = 259,973.21 : x
  2. Step 2: Convert to fraction form
    639,495.79/958,410.72 = 259,973.21/x
  3. Step 3: Cross multiply
    639,495.79x = 958,410.72 × 259,973.21
  4. Step 4: Simplify right side
    639,495.79x = 249,161,113,772.84
  5. Step 5: Solve for x
    x = 249,161,113,772.84/639,495.79
  6. Step 6: Final answer
    x = 389,621.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.