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Finding the Fourth Proportional to 978,364.16, 1,349,570.59 and 615,213.08

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Solution

The fourth proportional to 978,364.16, 1,349,570.59 and 615,213.08 is: 848,634.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,364.16 : 1,349,570.59 = 615,213.08 : x
  2. Step 2: Convert to fraction form
    978,364.16/1,349,570.59 = 615,213.08/x
  3. Step 3: Cross multiply
    978,364.16x = 1,349,570.59 × 615,213.08
  4. Step 4: Simplify right side
    978,364.16x = 830,273,471,065.43
  5. Step 5: Solve for x
    x = 830,273,471,065.43/978,364.16
  6. Step 6: Final answer
    x = 848,634.39

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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.