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Finding the Fourth Proportional to 805,940,963.40, 1,206,895,905.90 and 644,697,827.40

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Solution

The fourth proportional to 805,940,963.40, 1,206,895,905.90 and 644,697,827.40 is: 965,434,447.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,940,963.40 : 1,206,895,905.90 = 644,697,827.40 : x
  2. Step 2: Convert to fraction form
    805,940,963.40/1,206,895,905.90 = 644,697,827.40/x
  3. Step 3: Cross multiply
    805,940,963.40x = 1,206,895,905.90 × 644,697,827.40
  4. Step 4: Simplify right side
    805,940,963.40x = 778,083,168,431,684,864
  5. Step 5: Solve for x
    x = 778,083,168,431,684,864/805,940,963.40
  6. Step 6: Final answer
    x = 965,434,447.15

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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.