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Finding the Fourth Proportional to 646,988.90, 970,310.55 and 197,708.90

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Solution

The fourth proportional to 646,988.90, 970,310.55 and 197,708.90 is: 296,510.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,988.90 : 970,310.55 = 197,708.90 : x
  2. Step 2: Convert to fraction form
    646,988.90/970,310.55 = 197,708.90/x
  3. Step 3: Cross multiply
    646,988.90x = 970,310.55 × 197,708.90
  4. Step 4: Simplify right side
    646,988.90x = 191,839,031,498.90
  5. Step 5: Solve for x
    x = 191,839,031,498.90/646,988.90
  6. Step 6: Final answer
    x = 296,510.55

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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.