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Finding the Fourth Proportional to 702,943,920.04, 970,062,588.68 and 389,677,340.20

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Solution

The fourth proportional to 702,943,920.04, 970,062,588.68 and 389,677,340.20 is: 537,754,717.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,943,920.04 : 970,062,588.68 = 389,677,340.20 : x
  2. Step 2: Convert to fraction form
    702,943,920.04/970,062,588.68 = 389,677,340.20/x
  3. Step 3: Cross multiply
    702,943,920.04x = 970,062,588.68 × 389,677,340.20
  4. Step 4: Simplify right side
    702,943,920.04x = 378,011,409,384,348,992
  5. Step 5: Solve for x
    x = 378,011,409,384,348,992/702,943,920.04
  6. Step 6: Final answer
    x = 537,754,717.85

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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.