Home / 1,500,105.52-2,070,129.85-811,762.31

Finding the Fourth Proportional to 1,500,105.52, 2,070,129.85 and 811,762.31

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Solution

The fourth proportional to 1,500,105.52, 2,070,129.85 and 811,762.31 is: 1,120,223.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,500,105.52 : 2,070,129.85 = 811,762.31 : x
  2. Step 2: Convert to fraction form
    1,500,105.52/2,070,129.85 = 811,762.31/x
  3. Step 3: Cross multiply
    1,500,105.52x = 2,070,129.85 × 811,762.31
  4. Step 4: Simplify right side
    1,500,105.52x = 1,680,453,384,977.14
  5. Step 5: Solve for x
    x = 1,680,453,384,977.14/1,500,105.52
  6. Step 6: Final answer
    x = 1,120,223.45

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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.