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Finding the Fourth Proportional to 978,365.66, 1,349,572.65 and 615,214.58

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Solution

The fourth proportional to 978,365.66, 1,349,572.65 and 615,214.58 is: 848,636.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,365.66 : 1,349,572.65 = 615,214.58 : x
  2. Step 2: Convert to fraction form
    978,365.66/1,349,572.65 = 615,214.58/x
  3. Step 3: Cross multiply
    978,365.66x = 1,349,572.65 × 615,214.58
  4. Step 4: Simplify right side
    978,365.66x = 830,276,764,301.37
  5. Step 5: Solve for x
    x = 830,276,764,301.37/978,365.66
  6. Step 6: Final answer
    x = 848,636.46

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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.