Home / 1,091,689.80-1,638,117.90-492,743.40

Finding the Fourth Proportional to 1,091,689.80, 1,638,117.90 and 492,743.40

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Solution

The fourth proportional to 1,091,689.80, 1,638,117.90 and 492,743.40 is: 739,378.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091,689.80 : 1,638,117.90 = 492,743.40 : x
  2. Step 2: Convert to fraction form
    1,091,689.80/1,638,117.90 = 492,743.40/x
  3. Step 3: Cross multiply
    1,091,689.80x = 1,638,117.90 × 492,743.40
  4. Step 4: Simplify right side
    1,091,689.80x = 807,171,783,646.86
  5. Step 5: Solve for x
    x = 807,171,783,646.86/1,091,689.80
  6. Step 6: Final answer
    x = 739,378.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.