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Finding the Fourth Proportional to 666,970.60, 1,000,601.70 and 217,712.20

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Solution

The fourth proportional to 666,970.60, 1,000,601.70 and 217,712.20 is: 326,615.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,970.60 : 1,000,601.70 = 217,712.20 : x
  2. Step 2: Convert to fraction form
    666,970.60/1,000,601.70 = 217,712.20/x
  3. Step 3: Cross multiply
    666,970.60x = 1,000,601.70 × 217,712.20
  4. Step 4: Simplify right side
    666,970.60x = 217,843,197,430.74
  5. Step 5: Solve for x
    x = 217,843,197,430.74/666,970.60
  6. Step 6: Final answer
    x = 326,615.89

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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.