Home / 1,209,393.29-1,668,920.89-665,478.19

Finding the Fourth Proportional to 1,209,393.29, 1,668,920.89 and 665,478.19

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Solution

The fourth proportional to 1,209,393.29, 1,668,920.89 and 665,478.19 is: 918,336.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,393.29 : 1,668,920.89 = 665,478.19 : x
  2. Step 2: Convert to fraction form
    1,209,393.29/1,668,920.89 = 665,478.19/x
  3. Step 3: Cross multiply
    1,209,393.29x = 1,668,920.89 × 665,478.19
  4. Step 4: Simplify right side
    1,209,393.29x = 1,110,630,453,130.39
  5. Step 5: Solve for x
    x = 1,110,630,453,130.39/1,209,393.29
  6. Step 6: Final answer
    x = 918,336.87

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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.