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Finding the Fourth Proportional to 620,287.20, 870,173.55 and 620,287.20

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Solution

The fourth proportional to 620,287.20, 870,173.55 and 620,287.20 is: 870,173.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,287.20 : 870,173.55 = 620,287.20 : x
  2. Step 2: Convert to fraction form
    620,287.20/870,173.55 = 620,287.20/x
  3. Step 3: Cross multiply
    620,287.20x = 870,173.55 × 620,287.20
  4. Step 4: Simplify right side
    620,287.20x = 539,757,514,843.56
  5. Step 5: Solve for x
    x = 539,757,514,843.56/620,287.20
  6. Step 6: Final answer
    x = 870,173.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.