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Finding the Fourth Proportional to 407,074.80, 611,195.40 and 307,930.80

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Solution

The fourth proportional to 407,074.80, 611,195.40 and 307,930.80 is: 462,337.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,074.80 : 611,195.40 = 307,930.80 : x
  2. Step 2: Convert to fraction form
    407,074.80/611,195.40 = 307,930.80/x
  3. Step 3: Cross multiply
    407,074.80x = 611,195.40 × 307,930.80
  4. Step 4: Simplify right side
    407,074.80x = 188,205,888,478.32
  5. Step 5: Solve for x
    x = 188,205,888,478.32/407,074.80
  6. Step 6: Final answer
    x = 462,337.36

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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.