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Finding the Fourth Proportional to 855,812.12, 1,181,039.14 and 468,643.88

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Solution

The fourth proportional to 855,812.12, 1,181,039.14 and 468,643.88 is: 646,738.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,812.12 : 1,181,039.14 = 468,643.88 : x
  2. Step 2: Convert to fraction form
    855,812.12/1,181,039.14 = 468,643.88/x
  3. Step 3: Cross multiply
    855,812.12x = 1,181,039.14 × 468,643.88
  4. Step 4: Simplify right side
    855,812.12x = 553,486,765,001.46
  5. Step 5: Solve for x
    x = 553,486,765,001.46/855,812.12
  6. Step 6: Final answer
    x = 646,738.64

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1.5x scale

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.