Home / 1,121,619.62-1,547,781.08-638,139.62

Finding the Fourth Proportional to 1,121,619.62, 1,547,781.08 and 638,139.62

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Solution

The fourth proportional to 1,121,619.62, 1,547,781.08 and 638,139.62 is: 880,601.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,619.62 : 1,547,781.08 = 638,139.62 : x
  2. Step 2: Convert to fraction form
    1,121,619.62/1,547,781.08 = 638,139.62/x
  3. Step 3: Cross multiply
    1,121,619.62x = 1,547,781.08 × 638,139.62
  4. Step 4: Simplify right side
    1,121,619.62x = 987,700,430,234.39
  5. Step 5: Solve for x
    x = 987,700,430,234.39/1,121,619.62
  6. Step 6: Final answer
    x = 880,601.96

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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.