Home / 1,385,274.50-1,911,997.06-812,499.20

Finding the Fourth Proportional to 1,385,274.50, 1,911,997.06 and 812,499.20

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Solution

The fourth proportional to 1,385,274.50, 1,911,997.06 and 812,499.20 is: 1,121,435.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,274.50 : 1,911,997.06 = 812,499.20 : x
  2. Step 2: Convert to fraction form
    1,385,274.50/1,911,997.06 = 812,499.20/x
  3. Step 3: Cross multiply
    1,385,274.50x = 1,911,997.06 × 812,499.20
  4. Step 4: Simplify right side
    1,385,274.50x = 1,553,496,081,652.35
  5. Step 5: Solve for x
    x = 1,553,496,081,652.35/1,385,274.50
  6. Step 6: Final answer
    x = 1,121,435.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.