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Finding the Fourth Proportional to 657,321.63, 907,103.91 and 355,515.63

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Solution

The fourth proportional to 657,321.63, 907,103.91 and 355,515.63 is: 490,611.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,321.63 : 907,103.91 = 355,515.63 : x
  2. Step 2: Convert to fraction form
    657,321.63/907,103.91 = 355,515.63/x
  3. Step 3: Cross multiply
    657,321.63x = 907,103.91 × 355,515.63
  4. Step 4: Simplify right side
    657,321.63x = 322,489,618,039.11
  5. Step 5: Solve for x
    x = 322,489,618,039.11/657,321.63
  6. Step 6: Final answer
    x = 490,611.60

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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.