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Finding the Fourth Proportional to 656,258.25, 905,637 and 354,452.25

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Solution

The fourth proportional to 656,258.25, 905,637 and 354,452.25 is: 489,144.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,258.25 : 905,637 = 354,452.25 : x
  2. Step 2: Convert to fraction form
    656,258.25/905,637 = 354,452.25/x
  3. Step 3: Cross multiply
    656,258.25x = 905,637 × 354,452.25
  4. Step 4: Simplify right side
    656,258.25x = 321,005,072,333.25
  5. Step 5: Solve for x
    x = 321,005,072,333.25/656,258.25
  6. Step 6: Final answer
    x = 489,144.44

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1.5x scale

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.