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Finding the Fourth Proportional to 1,390,410, 1,918,765.80 and 754,506

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Solution

The fourth proportional to 1,390,410, 1,918,765.80 and 754,506 is: 1,041,218.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,410 : 1,918,765.80 = 754,506 : x
  2. Step 2: Convert to fraction form
    1,390,410/1,918,765.80 = 754,506/x
  3. Step 3: Cross multiply
    1,390,410x = 1,918,765.80 × 754,506
  4. Step 4: Simplify right side
    1,390,410x = 1,447,720,308,694.80
  5. Step 5: Solve for x
    x = 1,447,720,308,694.80/1,390,410
  6. Step 6: Final answer
    x = 1,041,218.28

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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.