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Finding the Fourth Proportional to 1,219,730, 1,683,227.40 and 742,802

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Solution

The fourth proportional to 1,219,730, 1,683,227.40 and 742,802 is: 1,025,066.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219,730 : 1,683,227.40 = 742,802 : x
  2. Step 2: Convert to fraction form
    1,219,730/1,683,227.40 = 742,802/x
  3. Step 3: Cross multiply
    1,219,730x = 1,683,227.40 × 742,802
  4. Step 4: Simplify right side
    1,219,730x = 1,250,304,679,174.80
  5. Step 5: Solve for x
    x = 1,250,304,679,174.80/1,219,730
  6. Step 6: Final answer
    x = 1,025,066.76

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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.