Home / 647,290,815.10-971,030,701.05-210,517,171.90

Finding the Fourth Proportional to 647,290,815.10, 971,030,701.05 and 210,517,171.90

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Solution

The fourth proportional to 647,290,815.10, 971,030,701.05 and 210,517,171.90 is: 315,806,484.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,290,815.10 : 971,030,701.05 = 210,517,171.90 : x
  2. Step 2: Convert to fraction form
    647,290,815.10/971,030,701.05 = 210,517,171.90/x
  3. Step 3: Cross multiply
    647,290,815.10x = 971,030,701.05 × 210,517,171.90
  4. Step 4: Simplify right side
    647,290,815.10x = 204,418,637,013,120,352
  5. Step 5: Solve for x
    x = 204,418,637,013,120,352/647,290,815.10
  6. Step 6: Final answer
    x = 315,806,484.88

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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.