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Finding the Fourth Proportional to 680,782.60, 1,021,212.30 and 207,483.40

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Solution

The fourth proportional to 680,782.60, 1,021,212.30 and 207,483.40 is: 311,236.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,782.60 : 1,021,212.30 = 207,483.40 : x
  2. Step 2: Convert to fraction form
    680,782.60/1,021,212.30 = 207,483.40/x
  3. Step 3: Cross multiply
    680,782.60x = 1,021,212.30 × 207,483.40
  4. Step 4: Simplify right side
    680,782.60x = 211,884,600,125.82
  5. Step 5: Solve for x
    x = 211,884,600,125.82/680,782.60
  6. Step 6: Final answer
    x = 311,236.80

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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.