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Finding the Fourth Proportional to 978,269.80, 1,349,440.36 and 615,118.72

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Solution

The fourth proportional to 978,269.80, 1,349,440.36 and 615,118.72 is: 848,504.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,269.80 : 1,349,440.36 = 615,118.72 : x
  2. Step 2: Convert to fraction form
    978,269.80/1,349,440.36 = 615,118.72/x
  3. Step 3: Cross multiply
    978,269.80x = 1,349,440.36 × 615,118.72
  4. Step 4: Simplify right side
    978,269.80x = 830,066,026,959.54
  5. Step 5: Solve for x
    x = 830,066,026,959.54/978,269.80
  6. Step 6: Final answer
    x = 848,504.19

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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.