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Finding the Fourth Proportional to 660,061.43, 910,728.66 and 373,581.51

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Solution

The fourth proportional to 660,061.43, 910,728.66 and 373,581.51 is: 515,454.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,061.43 : 910,728.66 = 373,581.51 : x
  2. Step 2: Convert to fraction form
    660,061.43/910,728.66 = 373,581.51/x
  3. Step 3: Cross multiply
    660,061.43x = 910,728.66 × 373,581.51
  4. Step 4: Simplify right side
    660,061.43x = 340,231,388,003.08
  5. Step 5: Solve for x
    x = 340,231,388,003.08/660,061.43
  6. Step 6: Final answer
    x = 515,454.13

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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.