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Finding the Fourth Proportional to 638,658,628.80, 881,350,156.80 and 345,303,196.80

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Solution

The fourth proportional to 638,658,628.80, 881,350,156.80 and 345,303,196.80 is: 476,519,086.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,658,628.80 : 881,350,156.80 = 345,303,196.80 : x
  2. Step 2: Convert to fraction form
    638,658,628.80/881,350,156.80 = 345,303,196.80/x
  3. Step 3: Cross multiply
    638,658,628.80x = 881,350,156.80 × 345,303,196.80
  4. Step 4: Simplify right side
    638,658,628.80x = 304,333,026,643,221,248
  5. Step 5: Solve for x
    x = 304,333,026,643,221,248/638,658,628.80
  6. Step 6: Final answer
    x = 476,519,086.91

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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.