Home / 1,290,338-1,780,666.44-725,090

Finding the Fourth Proportional to 1,290,338, 1,780,666.44 and 725,090

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Solution

The fourth proportional to 1,290,338, 1,780,666.44 and 725,090 is: 1,000,624.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,338 : 1,780,666.44 = 725,090 : x
  2. Step 2: Convert to fraction form
    1,290,338/1,780,666.44 = 725,090/x
  3. Step 3: Cross multiply
    1,290,338x = 1,780,666.44 × 725,090
  4. Step 4: Simplify right side
    1,290,338x = 1,291,143,428,979.60
  5. Step 5: Solve for x
    x = 1,291,143,428,979.60/1,290,338
  6. Step 6: Final answer
    x = 1,000,624.20

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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.