Home / 712,584,605.80-1,068,876,908.70-643,709,852.20

Finding the Fourth Proportional to 712,584,605.80, 1,068,876,908.70 and 643,709,852.20

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Solution

The fourth proportional to 712,584,605.80, 1,068,876,908.70 and 643,709,852.20 is: 965,564,778.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,584,605.80 : 1,068,876,908.70 = 643,709,852.20 : x
  2. Step 2: Convert to fraction form
    712,584,605.80/1,068,876,908.70 = 643,709,852.20/x
  3. Step 3: Cross multiply
    712,584,605.80x = 1,068,876,908.70 × 643,709,852.20
  4. Step 4: Simplify right side
    712,584,605.80x = 688,046,596,919,270,016
  5. Step 5: Solve for x
    x = 688,046,596,919,270,016/712,584,605.80
  6. Step 6: Final answer
    x = 965,564,778.30

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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.