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Finding the Fourth Proportional to 1,390,371, 1,918,711.98 and 754,467

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Solution

The fourth proportional to 1,390,371, 1,918,711.98 and 754,467 is: 1,041,164.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,371 : 1,918,711.98 = 754,467 : x
  2. Step 2: Convert to fraction form
    1,390,371/1,918,711.98 = 754,467/x
  3. Step 3: Cross multiply
    1,390,371x = 1,918,711.98 × 754,467
  4. Step 4: Simplify right side
    1,390,371x = 1,447,604,871,414.66
  5. Step 5: Solve for x
    x = 1,447,604,871,414.66/1,390,371
  6. Step 6: Final answer
    x = 1,041,164.46

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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.