Home / 1,209,390.43-1,668,916.95-665,475.36

Finding the Fourth Proportional to 1,209,390.43, 1,668,916.95 and 665,475.36

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Solution

The fourth proportional to 1,209,390.43, 1,668,916.95 and 665,475.36 is: 918,332.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,390.43 : 1,668,916.95 = 665,475.36 : x
  2. Step 2: Convert to fraction form
    1,209,390.43/1,668,916.95 = 665,475.36/x
  3. Step 3: Cross multiply
    1,209,390.43x = 1,668,916.95 × 665,475.36
  4. Step 4: Simplify right side
    1,209,390.43x = 1,110,623,108,745.04
  5. Step 5: Solve for x
    x = 1,110,623,108,745.04/1,209,390.43
  6. Step 6: Final answer
    x = 918,332.97

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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.