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Finding the Fourth Proportional to 1,425,214.02, 1,966,306.64 and 812,926.11

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Solution

The fourth proportional to 1,425,214.02, 1,966,306.64 and 812,926.11 is: 1,121,559.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425,214.02 : 1,966,306.64 = 812,926.11 : x
  2. Step 2: Convert to fraction form
    1,425,214.02/1,966,306.64 = 812,926.11/x
  3. Step 3: Cross multiply
    1,425,214.02x = 1,966,306.64 × 812,926.11
  4. Step 4: Simplify right side
    1,425,214.02x = 1,598,462,003,857.74
  5. Step 5: Solve for x
    x = 1,598,462,003,857.74/1,425,214.02
  6. Step 6: Final answer
    x = 1,121,559.28

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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.