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Finding the Fourth Proportional to 325,036.80, 447,275.52 and 287,400.96

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Solution

The fourth proportional to 325,036.80, 447,275.52 and 287,400.96 is: 395,485.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,036.80 : 447,275.52 = 287,400.96 : x
  2. Step 2: Convert to fraction form
    325,036.80/447,275.52 = 287,400.96/x
  3. Step 3: Cross multiply
    325,036.80x = 447,275.52 × 287,400.96
  4. Step 4: Simplify right side
    325,036.80x = 128,547,413,832.50
  5. Step 5: Solve for x
    x = 128,547,413,832.50/325,036.80
  6. Step 6: Final answer
    x = 395,485.72

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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.