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Finding the Fourth Proportional to 1,426,497.06, 1,968,566.40 and 781,921.64

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Solution

The fourth proportional to 1,426,497.06, 1,968,566.40 and 781,921.64 is: 1,079,052.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426,497.06 : 1,968,566.40 = 781,921.64 : x
  2. Step 2: Convert to fraction form
    1,426,497.06/1,968,566.40 = 781,921.64/x
  3. Step 3: Cross multiply
    1,426,497.06x = 1,968,566.40 × 781,921.64
  4. Step 4: Simplify right side
    1,426,497.06x = 1,539,264,667,936.90
  5. Step 5: Solve for x
    x = 1,539,264,667,936.90/1,426,497.06
  6. Step 6: Final answer
    x = 1,079,052.11

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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.