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Finding the Fourth Proportional to 438,783.40, 658,175.10 and 409,258.90

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Solution

The fourth proportional to 438,783.40, 658,175.10 and 409,258.90 is: 613,888.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,783.40 : 658,175.10 = 409,258.90 : x
  2. Step 2: Convert to fraction form
    438,783.40/658,175.10 = 409,258.90/x
  3. Step 3: Cross multiply
    438,783.40x = 658,175.10 × 409,258.90
  4. Step 4: Simplify right side
    438,783.40x = 269,364,017,433.39
  5. Step 5: Solve for x
    x = 269,364,017,433.39/438,783.40
  6. Step 6: Final answer
    x = 613,888.35

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1.5x scale

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.