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Finding the Fourth Proportional to 315,835.32, 473,670.90 and 91,145.64

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Solution

The fourth proportional to 315,835.32, 473,670.90 and 91,145.64 is: 136,694.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,835.32 : 473,670.90 = 91,145.64 : x
  2. Step 2: Convert to fraction form
    315,835.32/473,670.90 = 91,145.64/x
  3. Step 3: Cross multiply
    315,835.32x = 473,670.90 × 91,145.64
  4. Step 4: Simplify right side
    315,835.32x = 43,173,037,329.88
  5. Step 5: Solve for x
    x = 43,173,037,329.88/315,835.32
  6. Step 6: Final answer
    x = 136,694.77

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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.