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Finding the Fourth Proportional to 614,795.90, 921,209.70 and 404,187.80

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Solution

The fourth proportional to 614,795.90, 921,209.70 and 404,187.80 is: 605,634.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,795.90 : 921,209.70 = 404,187.80 : x
  2. Step 2: Convert to fraction form
    614,795.90/921,209.70 = 404,187.80/x
  3. Step 3: Cross multiply
    614,795.90x = 921,209.70 × 404,187.80
  4. Step 4: Simplify right side
    614,795.90x = 372,341,721,981.66
  5. Step 5: Solve for x
    x = 372,341,721,981.66/614,795.90
  6. Step 6: Final answer
    x = 605,634.69

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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.