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Finding the Fourth Proportional to 1,390,434, 1,918,798.92 and 754,530

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Solution

The fourth proportional to 1,390,434, 1,918,798.92 and 754,530 is: 1,041,251.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,434 : 1,918,798.92 = 754,530 : x
  2. Step 2: Convert to fraction form
    1,390,434/1,918,798.92 = 754,530/x
  3. Step 3: Cross multiply
    1,390,434x = 1,918,798.92 × 754,530
  4. Step 4: Simplify right side
    1,390,434x = 1,447,791,349,107.60
  5. Step 5: Solve for x
    x = 1,447,791,349,107.60/1,390,434
  6. Step 6: Final answer
    x = 1,041,251.40

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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.