Home / 1,209,143.60-1,668,583.75-665,279.76

Finding the Fourth Proportional to 1,209,143.60, 1,668,583.75 and 665,279.76

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Solution

The fourth proportional to 1,209,143.60, 1,668,583.75 and 665,279.76 is: 918,067.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,143.60 : 1,668,583.75 = 665,279.76 : x
  2. Step 2: Convert to fraction form
    1,209,143.60/1,668,583.75 = 665,279.76/x
  3. Step 3: Cross multiply
    1,209,143.60x = 1,668,583.75 × 665,279.76
  4. Step 4: Simplify right side
    1,209,143.60x = 1,110,074,988,502.61
  5. Step 5: Solve for x
    x = 1,110,074,988,502.61/1,209,143.60
  6. Step 6: Final answer
    x = 918,067.13

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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.