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Finding the Fourth Proportional to 370,921.80, 519,815.40 and 370,921.80

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Solution

The fourth proportional to 370,921.80, 519,815.40 and 370,921.80 is: 519,815.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,921.80 : 519,815.40 = 370,921.80 : x
  2. Step 2: Convert to fraction form
    370,921.80/519,815.40 = 370,921.80/x
  3. Step 3: Cross multiply
    370,921.80x = 519,815.40 × 370,921.80
  4. Step 4: Simplify right side
    370,921.80x = 192,810,863,835.72
  5. Step 5: Solve for x
    x = 192,810,863,835.72/370,921.80
  6. Step 6: Final answer
    x = 519,815.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.