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Finding the Fourth Proportional to 628,406.40, 941,572.80 and 312,182.40

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Solution

The fourth proportional to 628,406.40, 941,572.80 and 312,182.40 is: 467,758.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,406.40 : 941,572.80 = 312,182.40 : x
  2. Step 2: Convert to fraction form
    628,406.40/941,572.80 = 312,182.40/x
  3. Step 3: Cross multiply
    628,406.40x = 941,572.80 × 312,182.40
  4. Step 4: Simplify right side
    628,406.40x = 293,942,456,478.72
  5. Step 5: Solve for x
    x = 293,942,456,478.72/628,406.40
  6. Step 6: Final answer
    x = 467,758.53

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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.