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Finding the Fourth Proportional to 666,784.50, 1,000,264.65 and 217,347.90

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Solution

The fourth proportional to 666,784.50, 1,000,264.65 and 217,347.90 is: 326,050.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,784.50 : 1,000,264.65 = 217,347.90 : x
  2. Step 2: Convert to fraction form
    666,784.50/1,000,264.65 = 217,347.90/x
  3. Step 3: Cross multiply
    666,784.50x = 1,000,264.65 × 217,347.90
  4. Step 4: Simplify right side
    666,784.50x = 217,405,421,121.74
  5. Step 5: Solve for x
    x = 217,405,421,121.74/666,784.50
  6. Step 6: Final answer
    x = 326,050.50

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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.