Home / 877,105.80-1,315,658.70-212,257.80

Finding the Fourth Proportional to 877,105.80, 1,315,658.70 and 212,257.80

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Solution

The fourth proportional to 877,105.80, 1,315,658.70 and 212,257.80 is: 318,386.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,105.80 : 1,315,658.70 = 212,257.80 : x
  2. Step 2: Convert to fraction form
    877,105.80/1,315,658.70 = 212,257.80/x
  3. Step 3: Cross multiply
    877,105.80x = 1,315,658.70 × 212,257.80
  4. Step 4: Simplify right side
    877,105.80x = 279,258,821,212.86
  5. Step 5: Solve for x
    x = 279,258,821,212.86/877,105.80
  6. Step 6: Final answer
    x = 318,386.70

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Double scale
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Similar ratio
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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.