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Finding the Fourth Proportional to 708,950,129.30, 978,436,968.90 and 403,497,426.89

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Solution

The fourth proportional to 708,950,129.30, 978,436,968.90 and 403,497,426.89 is: 556,875,276.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,950,129.30 : 978,436,968.90 = 403,497,426.89 : x
  2. Step 2: Convert to fraction form
    708,950,129.30/978,436,968.90 = 403,497,426.89/x
  3. Step 3: Cross multiply
    708,950,129.30x = 978,436,968.90 × 403,497,426.89
  4. Step 4: Simplify right side
    708,950,129.30x = 394,796,799,325,200,960
  5. Step 5: Solve for x
    x = 394,796,799,325,200,960/708,950,129.30
  6. Step 6: Final answer
    x = 556,875,276.57

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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.