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Finding the Fourth Proportional to 1,425,681, 1,966,955.40 and 813,393.90

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Solution

The fourth proportional to 1,425,681, 1,966,955.40 and 813,393.90 is: 1,122,207.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425,681 : 1,966,955.40 = 813,393.90 : x
  2. Step 2: Convert to fraction form
    1,425,681/1,966,955.40 = 813,393.90/x
  3. Step 3: Cross multiply
    1,425,681x = 1,966,955.40 × 813,393.90
  4. Step 4: Simplify right side
    1,425,681x = 1,599,909,523,932.06
  5. Step 5: Solve for x
    x = 1,599,909,523,932.06/1,425,681
  6. Step 6: Final answer
    x = 1,122,207.23

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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.