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Finding the Fourth Proportional to 612,478.80, 845,223.12 and 340,571.52

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Solution

The fourth proportional to 612,478.80, 845,223.12 and 340,571.52 is: 469,990.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,478.80 : 845,223.12 = 340,571.52 : x
  2. Step 2: Convert to fraction form
    612,478.80/845,223.12 = 340,571.52/x
  3. Step 3: Cross multiply
    612,478.80x = 845,223.12 × 340,571.52
  4. Step 4: Simplify right side
    612,478.80x = 287,858,922,717.54
  5. Step 5: Solve for x
    x = 287,858,922,717.54/612,478.80
  6. Step 6: Final answer
    x = 469,990.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.