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Finding the Fourth Proportional to 978,254.33, 1,348,430.83 and 771,185.12

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Solution

The fourth proportional to 978,254.33, 1,348,430.83 and 771,185.12 is: 1,063,005.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,254.33 : 1,348,430.83 = 771,185.12 : x
  2. Step 2: Convert to fraction form
    978,254.33/1,348,430.83 = 771,185.12/x
  3. Step 3: Cross multiply
    978,254.33x = 1,348,430.83 × 771,185.12
  4. Step 4: Simplify right side
    978,254.33x = 1,039,889,782,775.13
  5. Step 5: Solve for x
    x = 1,039,889,782,775.13/978,254.33
  6. Step 6: Final answer
    x = 1,063,005.56

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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.