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Finding the Fourth Proportional to 639,659.88, 959,136.84 and 260,483.40

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Solution

The fourth proportional to 639,659.88, 959,136.84 and 260,483.40 is: 390,581.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,659.88 : 959,136.84 = 260,483.40 : x
  2. Step 2: Convert to fraction form
    639,659.88/959,136.84 = 260,483.40/x
  3. Step 3: Cross multiply
    639,659.88x = 959,136.84 × 260,483.40
  4. Step 4: Simplify right side
    639,659.88x = 249,839,225,148.46
  5. Step 5: Solve for x
    x = 249,839,225,148.46/639,659.88
  6. Step 6: Final answer
    x = 390,581.36

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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.