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Finding the Fourth Proportional to 620,172.60, 855,785.70 and 348,219.15

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Solution

The fourth proportional to 620,172.60, 855,785.70 and 348,219.15 is: 480,512.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,172.60 : 855,785.70 = 348,219.15 : x
  2. Step 2: Convert to fraction form
    620,172.60/855,785.70 = 348,219.15/x
  3. Step 3: Cross multiply
    620,172.60x = 855,785.70 × 348,219.15
  4. Step 4: Simplify right side
    620,172.60x = 298,000,969,036.16
  5. Step 5: Solve for x
    x = 298,000,969,036.16/620,172.60
  6. Step 6: Final answer
    x = 480,512.96

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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.