Home / 1,287,318,702.20-1,930,978,053.30-425,675,694.20

Finding the Fourth Proportional to 1,287,318,702.20, 1,930,978,053.30 and 425,675,694.20

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Solution

The fourth proportional to 1,287,318,702.20, 1,930,978,053.30 and 425,675,694.20 is: 638,513,541.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,318,702.20 : 1,930,978,053.30 = 425,675,694.20 : x
  2. Step 2: Convert to fraction form
    1,287,318,702.20/1,930,978,053.30 = 425,675,694.20/x
  3. Step 3: Cross multiply
    1,287,318,702.20x = 1,930,978,053.30 × 425,675,694.20
  4. Step 4: Simplify right side
    1,287,318,702.20x = 821,970,423,323,442,048
  5. Step 5: Solve for x
    x = 821,970,423,323,442,048/1,287,318,702.20
  6. Step 6: Final answer
    x = 638,513,541.30

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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.