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Finding the Fourth Proportional to 352,638.80, 528,958.20 and 345,640.40

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Solution

The fourth proportional to 352,638.80, 528,958.20 and 345,640.40 is: 518,460.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,638.80 : 528,958.20 = 345,640.40 : x
  2. Step 2: Convert to fraction form
    352,638.80/528,958.20 = 345,640.40/x
  3. Step 3: Cross multiply
    352,638.80x = 528,958.20 × 345,640.40
  4. Step 4: Simplify right side
    352,638.80x = 182,829,323,831.28
  5. Step 5: Solve for x
    x = 182,829,323,831.28/352,638.80
  6. Step 6: Final answer
    x = 518,460.60

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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.