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Finding the Fourth Proportional to 978,254.78, 1,349,419.65 and 615,103.70

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Solution

The fourth proportional to 978,254.78, 1,349,419.65 and 615,103.70 is: 848,483.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,254.78 : 1,349,419.65 = 615,103.70 : x
  2. Step 2: Convert to fraction form
    978,254.78/1,349,419.65 = 615,103.70/x
  3. Step 3: Cross multiply
    978,254.78x = 1,349,419.65 × 615,103.70
  4. Step 4: Simplify right side
    978,254.78x = 830,033,019,567.71
  5. Step 5: Solve for x
    x = 830,033,019,567.71/978,254.78
  6. Step 6: Final answer
    x = 848,483.48

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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.