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Finding the Fourth Proportional to 708,950,128.30, 978,436,967.52 and 403,497,425.89

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Solution

The fourth proportional to 708,950,128.30, 978,436,967.52 and 403,497,425.89 is: 556,875,275.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,950,128.30 : 978,436,967.52 = 403,497,425.89 : x
  2. Step 2: Convert to fraction form
    708,950,128.30/978,436,967.52 = 403,497,425.89/x
  3. Step 3: Cross multiply
    708,950,128.30x = 978,436,967.52 × 403,497,425.89
  4. Step 4: Simplify right side
    708,950,128.30x = 394,796,797,791,160,576
  5. Step 5: Solve for x
    x = 394,796,797,791,160,576/708,950,128.30
  6. Step 6: Final answer
    x = 556,875,275.19

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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.