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Finding the Fourth Proportional to 978,943.28, 1,350,962.56 and 549,254.48

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Solution

The fourth proportional to 978,943.28, 1,350,962.56 and 549,254.48 is: 757,982.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,943.28 : 1,350,962.56 = 549,254.48 : x
  2. Step 2: Convert to fraction form
    978,943.28/1,350,962.56 = 549,254.48/x
  3. Step 3: Cross multiply
    978,943.28x = 1,350,962.56 × 549,254.48
  4. Step 4: Simplify right side
    978,943.28x = 742,022,238,392.27
  5. Step 5: Solve for x
    x = 742,022,238,392.27/978,943.28
  6. Step 6: Final answer
    x = 757,982.87

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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.