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Finding the Fourth Proportional to 1,262,747.79, 1,742,630.13 and 689,824.89

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Solution

The fourth proportional to 1,262,747.79, 1,742,630.13 and 689,824.89 is: 951,979.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262,747.79 : 1,742,630.13 = 689,824.89 : x
  2. Step 2: Convert to fraction form
    1,262,747.79/1,742,630.13 = 689,824.89/x
  3. Step 3: Cross multiply
    1,262,747.79x = 1,742,630.13 × 689,824.89
  4. Step 4: Simplify right side
    1,262,747.79x = 1,202,109,637,737.94
  5. Step 5: Solve for x
    x = 1,202,109,637,737.94/1,262,747.79
  6. Step 6: Final answer
    x = 951,979.21

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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.