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Finding the Fourth Proportional to 642,258.84, 886,305.60 and 355,778.04

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Solution

The fourth proportional to 642,258.84, 886,305.60 and 355,778.04 is: 490,967.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,258.84 : 886,305.60 = 355,778.04 : x
  2. Step 2: Convert to fraction form
    642,258.84/886,305.60 = 355,778.04/x
  3. Step 3: Cross multiply
    642,258.84x = 886,305.60 × 355,778.04
  4. Step 4: Simplify right side
    642,258.84x = 315,328,069,209.02
  5. Step 5: Solve for x
    x = 315,328,069,209.02/642,258.84
  6. Step 6: Final answer
    x = 490,967.27

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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.