Home / 1,209,407.87-1,668,983.13-665,543.66

Finding the Fourth Proportional to 1,209,407.87, 1,668,983.13 and 665,543.66

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Solution

The fourth proportional to 1,209,407.87, 1,668,983.13 and 665,543.66 is: 918,450.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,407.87 : 1,668,983.13 = 665,543.66 : x
  2. Step 2: Convert to fraction form
    1,209,407.87/1,668,983.13 = 665,543.66/x
  3. Step 3: Cross multiply
    1,209,407.87x = 1,668,983.13 × 665,543.66
  4. Step 4: Simplify right side
    1,209,407.87x = 1,110,781,132,473.54
  5. Step 5: Solve for x
    x = 1,110,781,132,473.54/1,209,407.87
  6. Step 6: Final answer
    x = 918,450.40

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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.