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Finding the Fourth Proportional to 1,240,212.44, 1,711,061.04 and 781,368

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Solution

The fourth proportional to 1,240,212.44, 1,711,061.04 and 781,368 is: 1,078,015.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240,212.44 : 1,711,061.04 = 781,368 : x
  2. Step 2: Convert to fraction form
    1,240,212.44/1,711,061.04 = 781,368/x
  3. Step 3: Cross multiply
    1,240,212.44x = 1,711,061.04 × 781,368
  4. Step 4: Simplify right side
    1,240,212.44x = 1,336,968,342,702.72
  5. Step 5: Solve for x
    x = 1,336,968,342,702.72/1,240,212.44
  6. Step 6: Final answer
    x = 1,078,015.59

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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.