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Finding the Fourth Proportional to 978,247.95, 1,348,422.03 and 771,178.74

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Solution

The fourth proportional to 978,247.95, 1,348,422.03 and 771,178.74 is: 1,062,996.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,247.95 : 1,348,422.03 = 771,178.74 : x
  2. Step 2: Convert to fraction form
    978,247.95/1,348,422.03 = 771,178.74/x
  3. Step 3: Cross multiply
    978,247.95x = 1,348,422.03 × 771,178.74
  4. Step 4: Simplify right side
    978,247.95x = 1,039,874,402,083.64
  5. Step 5: Solve for x
    x = 1,039,874,402,083.64/978,247.95
  6. Step 6: Final answer
    x = 1,062,996.76

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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.