Home / 918,101.20-1,377,443.40-412,466.80

Finding the Fourth Proportional to 918,101.20, 1,377,443.40 and 412,466.80

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Solution

The fourth proportional to 918,101.20, 1,377,443.40 and 412,466.80 is: 618,831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,101.20 : 1,377,443.40 = 412,466.80 : x
  2. Step 2: Convert to fraction form
    918,101.20/1,377,443.40 = 412,466.80/x
  3. Step 3: Cross multiply
    918,101.20x = 1,377,443.40 × 412,466.80
  4. Step 4: Simplify right side
    918,101.20x = 568,149,671,379.12
  5. Step 5: Solve for x
    x = 568,149,671,379.12/918,101.20
  6. Step 6: Final answer
    x = 618,831.20

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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.