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Finding the Fourth Proportional to 978,322.09, 1,350,278.10 and 634,584.01

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Solution

The fourth proportional to 978,322.09, 1,350,278.10 and 634,584.01 is: 875,851.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,322.09 : 1,350,278.10 = 634,584.01 : x
  2. Step 2: Convert to fraction form
    978,322.09/1,350,278.10 = 634,584.01/x
  3. Step 3: Cross multiply
    978,322.09x = 1,350,278.10 × 634,584.01
  4. Step 4: Simplify right side
    978,322.09x = 856,864,891,313.18
  5. Step 5: Solve for x
    x = 856,864,891,313.18/978,322.09
  6. Step 6: Final answer
    x = 875,851.52

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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.