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Finding the Fourth Proportional to 862,815,007.20, 1,294,222,510.80 and 719,325,937.20

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Solution

The fourth proportional to 862,815,007.20, 1,294,222,510.80 and 719,325,937.20 is: 1,078,988,905.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,815,007.20 : 1,294,222,510.80 = 719,325,937.20 : x
  2. Step 2: Convert to fraction form
    862,815,007.20/1,294,222,510.80 = 719,325,937.20/x
  3. Step 3: Cross multiply
    862,815,007.20x = 1,294,222,510.80 × 719,325,937.20
  4. Step 4: Simplify right side
    862,815,007.20x = 930,967,820,526,547,200
  5. Step 5: Solve for x
    x = 930,967,820,526,547,200/862,815,007.20
  6. Step 6: Final answer
    x = 1,078,988,905.80

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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.