Home / 1,209,686.20-1,669,353.76-665,810.31

Finding the Fourth Proportional to 1,209,686.20, 1,669,353.76 and 665,810.31

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Solution

The fourth proportional to 1,209,686.20, 1,669,353.76 and 665,810.31 is: 918,810.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,686.20 : 1,669,353.76 = 665,810.31 : x
  2. Step 2: Convert to fraction form
    1,209,686.20/1,669,353.76 = 665,810.31/x
  3. Step 3: Cross multiply
    1,209,686.20x = 1,669,353.76 × 665,810.31
  4. Step 4: Simplify right side
    1,209,686.20x = 1,111,472,944,445.27
  5. Step 5: Solve for x
    x = 1,111,472,944,445.27/1,209,686.20
  6. Step 6: Final answer
    x = 918,810.96

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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.