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Finding the Fourth Proportional to 657,720, 907,660.08 and 355,920.48

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Solution

The fourth proportional to 657,720, 907,660.08 and 355,920.48 is: 491,173.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,720 : 907,660.08 = 355,920.48 : x
  2. Step 2: Convert to fraction form
    657,720/907,660.08 = 355,920.48/x
  3. Step 3: Cross multiply
    657,720x = 907,660.08 × 355,920.48
  4. Step 4: Simplify right side
    657,720x = 323,054,811,350.44
  5. Step 5: Solve for x
    x = 323,054,811,350.44/657,720
  6. Step 6: Final answer
    x = 491,173.77

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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.