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Finding the Fourth Proportional to 620,239.63, 855,904.17 and 362,130.90

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Solution

The fourth proportional to 620,239.63, 855,904.17 and 362,130.90 is: 499,725.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,239.63 : 855,904.17 = 362,130.90 : x
  2. Step 2: Convert to fraction form
    620,239.63/855,904.17 = 362,130.90/x
  3. Step 3: Cross multiply
    620,239.63x = 855,904.17 × 362,130.90
  4. Step 4: Simplify right side
    620,239.63x = 309,949,348,321.68
  5. Step 5: Solve for x
    x = 309,949,348,321.68/620,239.63
  6. Step 6: Final answer
    x = 499,725.16

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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.