Home / 287,781.12-397,247.40-216,368.64

Finding the Fourth Proportional to 287,781.12, 397,247.40 and 216,368.64

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Solution

The fourth proportional to 287,781.12, 397,247.40 and 216,368.64 is: 298,671.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,781.12 : 397,247.40 = 216,368.64 : x
  2. Step 2: Convert to fraction form
    287,781.12/397,247.40 = 216,368.64/x
  3. Step 3: Cross multiply
    287,781.12x = 397,247.40 × 216,368.64
  4. Step 4: Simplify right side
    287,781.12x = 85,951,879,681.54
  5. Step 5: Solve for x
    x = 85,951,879,681.54/287,781.12
  6. Step 6: Final answer
    x = 298,671.02

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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.