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Finding the Fourth Proportional to 6,642,903.40, 9,964,355.10 and 1,851,332.20

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Solution

The fourth proportional to 6,642,903.40, 9,964,355.10 and 1,851,332.20 is: 2,776,998.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,642,903.40 : 9,964,355.10 = 1,851,332.20 : x
  2. Step 2: Convert to fraction form
    6,642,903.40/9,964,355.10 = 1,851,332.20/x
  3. Step 3: Cross multiply
    6,642,903.40x = 9,964,355.10 × 1,851,332.20
  4. Step 4: Simplify right side
    6,642,903.40x = 18,447,331,448,864.22
  5. Step 5: Solve for x
    x = 18,447,331,448,864.22/6,642,903.40
  6. Step 6: Final answer
    x = 2,776,998.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.