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Finding the Fourth Proportional to 887,992.80, 1,330,458.30 and 413,705.40

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Solution

The fourth proportional to 887,992.80, 1,330,458.30 and 413,705.40 is: 619,844.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,992.80 : 1,330,458.30 = 413,705.40 : x
  2. Step 2: Convert to fraction form
    887,992.80/1,330,458.30 = 413,705.40/x
  3. Step 3: Cross multiply
    887,992.80x = 1,330,458.30 × 413,705.40
  4. Step 4: Simplify right side
    887,992.80x = 550,417,783,184.82
  5. Step 5: Solve for x
    x = 550,417,783,184.82/887,992.80
  6. Step 6: Final answer
    x = 619,844.87

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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.