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Finding the Fourth Proportional to 315,657.60, 473,486.40 and 78,999.90

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Solution

The fourth proportional to 315,657.60, 473,486.40 and 78,999.90 is: 118,499.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,657.60 : 473,486.40 = 78,999.90 : x
  2. Step 2: Convert to fraction form
    315,657.60/473,486.40 = 78,999.90/x
  3. Step 3: Cross multiply
    315,657.60x = 473,486.40 × 78,999.90
  4. Step 4: Simplify right side
    315,657.60x = 37,405,378,251.36
  5. Step 5: Solve for x
    x = 37,405,378,251.36/315,657.60
  6. Step 6: Final answer
    x = 118,499.85

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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.