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Finding the Fourth Proportional to 638,842,242.87, 881,604,951.08 and 345,486,810.87

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Solution

The fourth proportional to 638,842,242.87, 881,604,951.08 and 345,486,810.87 is: 476,773,235.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,842,242.87 : 881,604,951.08 = 345,486,810.87 : x
  2. Step 2: Convert to fraction form
    638,842,242.87/881,604,951.08 = 345,486,810.87/x
  3. Step 3: Cross multiply
    638,842,242.87x = 881,604,951.08 × 345,486,810.87
  4. Step 4: Simplify right side
    638,842,242.87x = 304,582,882,994,104,128
  5. Step 5: Solve for x
    x = 304,582,882,994,104,128/638,842,242.87
  6. Step 6: Final answer
    x = 476,773,235.32

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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.