Home / 1,387,379.56-2,081,070.06-390,107.56

Finding the Fourth Proportional to 1,387,379.56, 2,081,070.06 and 390,107.56

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Solution

The fourth proportional to 1,387,379.56, 2,081,070.06 and 390,107.56 is: 585,161.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,379.56 : 2,081,070.06 = 390,107.56 : x
  2. Step 2: Convert to fraction form
    1,387,379.56/2,081,070.06 = 390,107.56/x
  3. Step 3: Cross multiply
    1,387,379.56x = 2,081,070.06 × 390,107.56
  4. Step 4: Simplify right side
    1,387,379.56x = 811,841,163,295.65
  5. Step 5: Solve for x
    x = 811,841,163,295.65/1,387,379.56
  6. Step 6: Final answer
    x = 585,161.54

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Double scale
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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.