Home / 647,290,815.60-971,030,701.80-210,517,172.40

Finding the Fourth Proportional to 647,290,815.60, 971,030,701.80 and 210,517,172.40

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Solution

The fourth proportional to 647,290,815.60, 971,030,701.80 and 210,517,172.40 is: 315,806,485.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,290,815.60 : 971,030,701.80 = 210,517,172.40 : x
  2. Step 2: Convert to fraction form
    647,290,815.60/971,030,701.80 = 210,517,172.40/x
  3. Step 3: Cross multiply
    647,290,815.60x = 971,030,701.80 × 210,517,172.40
  4. Step 4: Simplify right side
    647,290,815.60x = 204,418,637,656,523,584
  5. Step 5: Solve for x
    x = 204,418,637,656,523,584/647,290,815.60
  6. Step 6: Final answer
    x = 315,806,485.63

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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.