Home / 918,056.70-1,377,279.45-278,307.90

Finding the Fourth Proportional to 918,056.70, 1,377,279.45 and 278,307.90

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Solution

The fourth proportional to 918,056.70, 1,377,279.45 and 278,307.90 is: 417,520.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,056.70 : 1,377,279.45 = 278,307.90 : x
  2. Step 2: Convert to fraction form
    918,056.70/1,377,279.45 = 278,307.90/x
  3. Step 3: Cross multiply
    918,056.70x = 1,377,279.45 × 278,307.90
  4. Step 4: Simplify right side
    918,056.70x = 383,307,751,442.66
  5. Step 5: Solve for x
    x = 383,307,751,442.66/918,056.70
  6. Step 6: Final answer
    x = 417,520.78

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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.