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Finding the Fourth Proportional to 1,390,522, 1,918,920.36 and 754,618

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Solution

The fourth proportional to 1,390,522, 1,918,920.36 and 754,618 is: 1,041,372.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,522 : 1,918,920.36 = 754,618 : x
  2. Step 2: Convert to fraction form
    1,390,522/1,918,920.36 = 754,618/x
  3. Step 3: Cross multiply
    1,390,522x = 1,918,920.36 × 754,618
  4. Step 4: Simplify right side
    1,390,522x = 1,448,051,844,222.48
  5. Step 5: Solve for x
    x = 1,448,051,844,222.48/1,390,522
  6. Step 6: Final answer
    x = 1,041,372.84

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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.