Home / 858,431,054.40-1,287,646,581.60-212,198,798.40

Finding the Fourth Proportional to 858,431,054.40, 1,287,646,581.60 and 212,198,798.40

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Solution

The fourth proportional to 858,431,054.40, 1,287,646,581.60 and 212,198,798.40 is: 318,298,197.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,431,054.40 : 1,287,646,581.60 = 212,198,798.40 : x
  2. Step 2: Convert to fraction form
    858,431,054.40/1,287,646,581.60 = 212,198,798.40/x
  3. Step 3: Cross multiply
    858,431,054.40x = 1,287,646,581.60 × 212,198,798.40
  4. Step 4: Simplify right side
    858,431,054.40x = 273,237,057,379,387,552
  5. Step 5: Solve for x
    x = 273,237,057,379,387,552/858,431,054.40
  6. Step 6: Final answer
    x = 318,298,197.60

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Double scale
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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.