Home / 712,584,738.80-1,068,877,108.20-643,709,985.20

Finding the Fourth Proportional to 712,584,738.80, 1,068,877,108.20 and 643,709,985.20

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Solution

The fourth proportional to 712,584,738.80, 1,068,877,108.20 and 643,709,985.20 is: 965,564,977.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,584,738.80 : 1,068,877,108.20 = 643,709,985.20 : x
  2. Step 2: Convert to fraction form
    712,584,738.80/1,068,877,108.20 = 643,709,985.20/x
  3. Step 3: Cross multiply
    712,584,738.80x = 1,068,877,108.20 × 643,709,985.20
  4. Step 4: Simplify right side
    712,584,738.80x = 688,046,867,500,040,832
  5. Step 5: Solve for x
    x = 688,046,867,500,040,832/712,584,738.80
  6. Step 6: Final answer
    x = 965,564,977.80

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Double scale
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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.