Home / 1,230,189.90-1,697,663.12-686,325.79

Finding the Fourth Proportional to 1,230,189.90, 1,697,663.12 and 686,325.79

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Solution

The fourth proportional to 1,230,189.90, 1,697,663.12 and 686,325.79 is: 947,130.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230,189.90 : 1,697,663.12 = 686,325.79 : x
  2. Step 2: Convert to fraction form
    1,230,189.90/1,697,663.12 = 686,325.79/x
  3. Step 3: Cross multiply
    1,230,189.90x = 1,697,663.12 × 686,325.79
  4. Step 4: Simplify right side
    1,230,189.90x = 1,165,149,981,987.87
  5. Step 5: Solve for x
    x = 1,165,149,981,987.87/1,230,189.90
  6. Step 6: Final answer
    x = 947,130.18

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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.