Home / 1,209,394.89-1,668,923.10-665,479.82

Finding the Fourth Proportional to 1,209,394.89, 1,668,923.10 and 665,479.82

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Solution

The fourth proportional to 1,209,394.89, 1,668,923.10 and 665,479.82 is: 918,339.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,394.89 : 1,668,923.10 = 665,479.82 : x
  2. Step 2: Convert to fraction form
    1,209,394.89/1,668,923.10 = 665,479.82/x
  3. Step 3: Cross multiply
    1,209,394.89x = 1,668,923.10 × 665,479.82
  4. Step 4: Simplify right side
    1,209,394.89x = 1,110,634,635,837.23
  5. Step 5: Solve for x
    x = 1,110,634,635,837.23/1,209,394.89
  6. Step 6: Final answer
    x = 918,339.12

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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.