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Finding the Fourth Proportional to 916,960.20, 1,375,634.70 and 277,211.40

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Solution

The fourth proportional to 916,960.20, 1,375,634.70 and 277,211.40 is: 415,875.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,960.20 : 1,375,634.70 = 277,211.40 : x
  2. Step 2: Convert to fraction form
    916,960.20/1,375,634.70 = 277,211.40/x
  3. Step 3: Cross multiply
    916,960.20x = 1,375,634.70 × 277,211.40
  4. Step 4: Simplify right side
    916,960.20x = 381,341,621,075.58
  5. Step 5: Solve for x
    x = 381,341,621,075.58/916,960.20
  6. Step 6: Final answer
    x = 415,875.87

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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.