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Finding the Fourth Proportional to 315,588.56, 473,382.90 and 78,931.26

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Solution

The fourth proportional to 315,588.56, 473,382.90 and 78,931.26 is: 118,396.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,588.56 : 473,382.90 = 78,931.26 : x
  2. Step 2: Convert to fraction form
    315,588.56/473,382.90 = 78,931.26/x
  3. Step 3: Cross multiply
    315,588.56x = 473,382.90 × 78,931.26
  4. Step 4: Simplify right side
    315,588.56x = 37,364,708,759.45
  5. Step 5: Solve for x
    x = 37,364,708,759.45/315,588.56
  6. Step 6: Final answer
    x = 118,396.91

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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.