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Finding the Fourth Proportional to 657,786.90, 907,748.73 and 355,980.90

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Solution

The fourth proportional to 657,786.90, 907,748.73 and 355,980.90 is: 491,255.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,786.90 : 907,748.73 = 355,980.90 : x
  2. Step 2: Convert to fraction form
    657,786.90/907,748.73 = 355,980.90/x
  3. Step 3: Cross multiply
    657,786.90x = 907,748.73 × 355,980.90
  4. Step 4: Simplify right side
    657,786.90x = 323,141,209,879.26
  5. Step 5: Solve for x
    x = 323,141,209,879.26/657,786.90
  6. Step 6: Final answer
    x = 491,255.16

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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.