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Finding the Fourth Proportional to 1,354,929.28, 1,869,667.67 and 782,153.98

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Solution

The fourth proportional to 1,354,929.28, 1,869,667.67 and 782,153.98 is: 1,079,294.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354,929.28 : 1,869,667.67 = 782,153.98 : x
  2. Step 2: Convert to fraction form
    1,354,929.28/1,869,667.67 = 782,153.98/x
  3. Step 3: Cross multiply
    1,354,929.28x = 1,869,667.67 × 782,153.98
  4. Step 4: Simplify right side
    1,354,929.28x = 1,462,368,006,649.04
  5. Step 5: Solve for x
    x = 1,462,368,006,649.04/1,354,929.28
  6. Step 6: Final answer
    x = 1,079,294.71

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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.