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Finding the Fourth Proportional to 418,258.48, 627,386.46 and 118,739.32

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Solution

The fourth proportional to 418,258.48, 627,386.46 and 118,739.32 is: 178,108.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,258.48 : 627,386.46 = 118,739.32 : x
  2. Step 2: Convert to fraction form
    418,258.48/627,386.46 = 118,739.32/x
  3. Step 3: Cross multiply
    418,258.48x = 627,386.46 × 118,739.32
  4. Step 4: Simplify right side
    418,258.48x = 74,495,441,637.61
  5. Step 5: Solve for x
    x = 74,495,441,637.61/418,258.48
  6. Step 6: Final answer
    x = 178,108.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.