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Finding the Fourth Proportional to 708,822,692.16, 978,175,492.47 and 391,283,122.56

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Solution

The fourth proportional to 708,822,692.16, 978,175,492.47 and 391,283,122.56 is: 539,970,807.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,822,692.16 : 978,175,492.47 = 391,283,122.56 : x
  2. Step 2: Convert to fraction form
    708,822,692.16/978,175,492.47 = 391,283,122.56/x
  3. Step 3: Cross multiply
    708,822,692.16x = 978,175,492.47 × 391,283,122.56
  4. Step 4: Simplify right side
    708,822,692.16x = 382,743,561,105,327,360
  5. Step 5: Solve for x
    x = 382,743,561,105,327,360/708,822,692.16
  6. Step 6: Final answer
    x = 539,970,807.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.