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Finding the Fourth Proportional to 3,719,428, 5,579,142 and 917,764

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Solution

The fourth proportional to 3,719,428, 5,579,142 and 917,764 is: 1,376,646

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,719,428 : 5,579,142 = 917,764 : x
  2. Step 2: Convert to fraction form
    3,719,428/5,579,142 = 917,764/x
  3. Step 3: Cross multiply
    3,719,428x = 5,579,142 × 917,764
  4. Step 4: Simplify right side
    3,719,428x = 5,120,335,678,488
  5. Step 5: Solve for x
    x = 5,120,335,678,488/3,719,428
  6. Step 6: Final answer
    x = 1,376,646

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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.