Home / 1,121,470.75-1,547,664.66-638,105.48

Finding the Fourth Proportional to 1,121,470.75, 1,547,664.66 and 638,105.48

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Solution

The fourth proportional to 1,121,470.75, 1,547,664.66 and 638,105.48 is: 880,605.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,470.75 : 1,547,664.66 = 638,105.48 : x
  2. Step 2: Convert to fraction form
    1,121,470.75/1,547,664.66 = 638,105.48/x
  3. Step 3: Cross multiply
    1,121,470.75x = 1,547,664.66 × 638,105.48
  4. Step 4: Simplify right side
    1,121,470.75x = 987,573,300,748.34
  5. Step 5: Solve for x
    x = 987,573,300,748.34/1,121,470.75
  6. Step 6: Final answer
    x = 880,605.49

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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.