Home / 287,276.68-430,914.12-76,914.64

Finding the Fourth Proportional to 287,276.68, 430,914.12 and 76,914.64

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Solution

The fourth proportional to 287,276.68, 430,914.12 and 76,914.64 is: 115,371.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,276.68 : 430,914.12 = 76,914.64 : x
  2. Step 2: Convert to fraction form
    287,276.68/430,914.12 = 76,914.64/x
  3. Step 3: Cross multiply
    287,276.68x = 430,914.12 × 76,914.64
  4. Step 4: Simplify right side
    287,276.68x = 33,143,604,410.72
  5. Step 5: Solve for x
    x = 33,143,604,410.72/287,276.68
  6. Step 6: Final answer
    x = 115,371.72

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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.