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Finding the Fourth Proportional to 870,647.62, 1,201,427.80 and 488,600.59

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Solution

The fourth proportional to 870,647.62, 1,201,427.80 and 488,600.59 is: 674,231.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,647.62 : 1,201,427.80 = 488,600.59 : x
  2. Step 2: Convert to fraction form
    870,647.62/1,201,427.80 = 488,600.59/x
  3. Step 3: Cross multiply
    870,647.62x = 1,201,427.80 × 488,600.59
  4. Step 4: Simplify right side
    870,647.62x = 587,018,331,922.40
  5. Step 5: Solve for x
    x = 587,018,331,922.40/870,647.62
  6. Step 6: Final answer
    x = 674,231.82

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Double scale
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1.5x scale

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.