Home / 1,385,889.18-1,911,990.33-812,720.22

Finding the Fourth Proportional to 1,385,889.18, 1,911,990.33 and 812,720.22

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Solution

The fourth proportional to 1,385,889.18, 1,911,990.33 and 812,720.22 is: 1,121,239.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,889.18 : 1,911,990.33 = 812,720.22 : x
  2. Step 2: Convert to fraction form
    1,385,889.18/1,911,990.33 = 812,720.22/x
  3. Step 3: Cross multiply
    1,385,889.18x = 1,911,990.33 × 812,720.22
  4. Step 4: Simplify right side
    1,385,889.18x = 1,553,913,201,635.47
  5. Step 5: Solve for x
    x = 1,553,913,201,635.47/1,385,889.18
  6. Step 6: Final answer
    x = 1,121,239.15

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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.