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Finding the Fourth Proportional to 978,254.28, 1,349,418.96 and 615,103.20

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Solution

The fourth proportional to 978,254.28, 1,349,418.96 and 615,103.20 is: 848,482.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,254.28 : 1,349,418.96 = 615,103.20 : x
  2. Step 2: Convert to fraction form
    978,254.28/1,349,418.96 = 615,103.20/x
  3. Step 3: Cross multiply
    978,254.28x = 1,349,418.96 × 615,103.20
  4. Step 4: Simplify right side
    978,254.28x = 830,031,920,436.67
  5. Step 5: Solve for x
    x = 830,031,920,436.67/978,254.28
  6. Step 6: Final answer
    x = 848,482.79

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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.