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Finding the Fourth Proportional to 639,291.40, 958,272.90 and 260,049.40

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Solution

The fourth proportional to 639,291.40, 958,272.90 and 260,049.40 is: 389,803.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,291.40 : 958,272.90 = 260,049.40 : x
  2. Step 2: Convert to fraction form
    639,291.40/958,272.90 = 260,049.40/x
  3. Step 3: Cross multiply
    639,291.40x = 958,272.90 × 260,049.40
  4. Step 4: Simplify right side
    639,291.40x = 249,198,292,681.26
  5. Step 5: Solve for x
    x = 249,198,292,681.26/639,291.40
  6. Step 6: Final answer
    x = 389,803.92

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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.