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Finding the Fourth Proportional to 628,019,499.12, 866,666,948.40 and 349,555,044.48

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Solution

The fourth proportional to 628,019,499.12, 866,666,948.40 and 349,555,044.48 is: 482,385,983.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,019,499.12 : 866,666,948.40 = 349,555,044.48 : x
  2. Step 2: Convert to fraction form
    628,019,499.12/866,666,948.40 = 349,555,044.48/x
  3. Step 3: Cross multiply
    628,019,499.12x = 866,666,948.40 × 349,555,044.48
  4. Step 4: Simplify right side
    628,019,499.12x = 302,947,803,697,307,904
  5. Step 5: Solve for x
    x = 302,947,803,697,307,904/628,019,499.12
  6. Step 6: Final answer
    x = 482,385,983.43

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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.