Home / 520,722,354.40-781,083,570.48-405,792,918.88

Finding the Fourth Proportional to 520,722,354.40, 781,083,570.48 and 405,792,918.88

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Solution

The fourth proportional to 520,722,354.40, 781,083,570.48 and 405,792,918.88 is: 608,689,408.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,722,354.40 : 781,083,570.48 = 405,792,918.88 : x
  2. Step 2: Convert to fraction form
    520,722,354.40/781,083,570.48 = 405,792,918.88/x
  3. Step 3: Cross multiply
    520,722,354.40x = 781,083,570.48 × 405,792,918.88
  4. Step 4: Simplify right side
    520,722,354.40x = 316,958,181,954,291,392
  5. Step 5: Solve for x
    x = 316,958,181,954,291,392/520,722,354.40
  6. Step 6: Final answer
    x = 608,689,408.62

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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.