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Finding the Fourth Proportional to 1,392,968.72, 1,922,572.54 and 903,544.77

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Solution

The fourth proportional to 1,392,968.72, 1,922,572.54 and 903,544.77 is: 1,247,070.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,968.72 : 1,922,572.54 = 903,544.77 : x
  2. Step 2: Convert to fraction form
    1,392,968.72/1,922,572.54 = 903,544.77/x
  3. Step 3: Cross multiply
    1,392,968.72x = 1,922,572.54 × 903,544.77
  4. Step 4: Simplify right side
    1,392,968.72x = 1,737,130,363,462.62
  5. Step 5: Solve for x
    x = 1,737,130,363,462.62/1,392,968.72
  6. Step 6: Final answer
    x = 1,247,070.62

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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.