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Finding the Fourth Proportional to 978,363.28, 1,349,569.38 and 615,212.20

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Solution

The fourth proportional to 978,363.28, 1,349,569.38 and 615,212.20 is: 848,633.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,363.28 : 1,349,569.38 = 615,212.20 : x
  2. Step 2: Convert to fraction form
    978,363.28/1,349,569.38 = 615,212.20/x
  3. Step 3: Cross multiply
    978,363.28x = 1,349,569.38 × 615,212.20
  4. Step 4: Simplify right side
    978,363.28x = 830,271,547,322.44
  5. Step 5: Solve for x
    x = 830,271,547,322.44/978,363.28
  6. Step 6: Final answer
    x = 848,633.19

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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.