Home / 858,431,187.40-1,287,646,781.10-212,198,931.40

Finding the Fourth Proportional to 858,431,187.40, 1,287,646,781.10 and 212,198,931.40

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Solution

The fourth proportional to 858,431,187.40, 1,287,646,781.10 and 212,198,931.40 is: 318,298,397.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,431,187.40 : 1,287,646,781.10 = 212,198,931.40 : x
  2. Step 2: Convert to fraction form
    858,431,187.40/1,287,646,781.10 = 212,198,931.40/x
  3. Step 3: Cross multiply
    858,431,187.40x = 1,287,646,781.10 × 212,198,931.40
  4. Step 4: Simplify right side
    858,431,187.40x = 273,237,270,970,069,696
  5. Step 5: Solve for x
    x = 273,237,270,970,069,696/858,431,187.40
  6. Step 6: Final answer
    x = 318,298,397.10

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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.