Home / 1,209,006.31-1,668,428.68-665,130.40

Finding the Fourth Proportional to 1,209,006.31, 1,668,428.68 and 665,130.40

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Solution

The fourth proportional to 1,209,006.31, 1,668,428.68 and 665,130.40 is: 917,879.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,006.31 : 1,668,428.68 = 665,130.40 : x
  2. Step 2: Convert to fraction form
    1,209,006.31/1,668,428.68 = 665,130.40/x
  3. Step 3: Cross multiply
    1,209,006.31x = 1,668,428.68 × 665,130.40
  4. Step 4: Simplify right side
    1,209,006.31x = 1,109,722,635,299.87
  5. Step 5: Solve for x
    x = 1,109,722,635,299.87/1,209,006.31
  6. Step 6: Final answer
    x = 917,879.94

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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.