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Finding the Fourth Proportional to 676,745.92, 933,847.28 and 390,210.64

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Solution

The fourth proportional to 676,745.92, 933,847.28 and 390,210.64 is: 538,454.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,745.92 : 933,847.28 = 390,210.64 : x
  2. Step 2: Convert to fraction form
    676,745.92/933,847.28 = 390,210.64/x
  3. Step 3: Cross multiply
    676,745.92x = 933,847.28 × 390,210.64
  4. Step 4: Simplify right side
    676,745.92x = 364,397,144,791.06
  5. Step 5: Solve for x
    x = 364,397,144,791.06/676,745.92
  6. Step 6: Final answer
    x = 538,454.88

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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.