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Finding the Fourth Proportional to 611,388,987.60, 917,139,468.60 and 247,808,110.80

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Solution

The fourth proportional to 611,388,987.60, 917,139,468.60 and 247,808,110.80 is: 371,734,858.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,388,987.60 : 917,139,468.60 = 247,808,110.80 : x
  2. Step 2: Convert to fraction form
    611,388,987.60/917,139,468.60 = 247,808,110.80/x
  3. Step 3: Cross multiply
    611,388,987.60x = 917,139,468.60 × 247,808,110.80
  4. Step 4: Simplify right side
    611,388,987.60x = 227,274,599,053,881,952
  5. Step 5: Solve for x
    x = 227,274,599,053,881,952/611,388,987.60
  6. Step 6: Final answer
    x = 371,734,858.93

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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.