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Finding the Fourth Proportional to 639,254.90, 958,218.15 and 260,012.90

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Solution

The fourth proportional to 639,254.90, 958,218.15 and 260,012.90 is: 389,749.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,254.90 : 958,218.15 = 260,012.90 : x
  2. Step 2: Convert to fraction form
    639,254.90/958,218.15 = 260,012.90/x
  3. Step 3: Cross multiply
    639,254.90x = 958,218.15 × 260,012.90
  4. Step 4: Simplify right side
    639,254.90x = 249,149,080,014.14
  5. Step 5: Solve for x
    x = 249,149,080,014.14/639,254.90
  6. Step 6: Final answer
    x = 389,749.19

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1.5x scale

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.