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Finding the Fourth Proportional to 642,447,888.68, 886,583,400.72 and 349,092,456.68

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Solution

The fourth proportional to 642,447,888.68, 886,583,400.72 and 349,092,456.68 is: 481,750,477.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,447,888.68 : 886,583,400.72 = 349,092,456.68 : x
  2. Step 2: Convert to fraction form
    642,447,888.68/886,583,400.72 = 349,092,456.68/x
  3. Step 3: Cross multiply
    642,447,888.68x = 886,583,400.72 × 349,092,456.68
  4. Step 4: Simplify right side
    642,447,888.68x = 309,499,577,409,053,696
  5. Step 5: Solve for x
    x = 309,499,577,409,053,696/642,447,888.68
  6. Step 6: Final answer
    x = 481,750,477.92

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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.