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Finding the Fourth Proportional to 352,019.28, 528,023.52 and 85,780.32

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Solution

The fourth proportional to 352,019.28, 528,023.52 and 85,780.32 is: 128,669.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,019.28 : 528,023.52 = 85,780.32 : x
  2. Step 2: Convert to fraction form
    352,019.28/528,023.52 = 85,780.32/x
  3. Step 3: Cross multiply
    352,019.28x = 528,023.52 × 85,780.32
  4. Step 4: Simplify right side
    352,019.28x = 45,294,026,513.13
  5. Step 5: Solve for x
    x = 45,294,026,513.13/352,019.28
  6. Step 6: Final answer
    x = 128,669.16

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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.