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Finding the Fourth Proportional to 657,609.78, 907,501.44 and 355,803.78

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Solution

The fourth proportional to 657,609.78, 907,501.44 and 355,803.78 is: 491,009.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,609.78 : 907,501.44 = 355,803.78 : x
  2. Step 2: Convert to fraction form
    657,609.78/907,501.44 = 355,803.78/x
  3. Step 3: Cross multiply
    657,609.78x = 907,501.44 × 355,803.78
  4. Step 4: Simplify right side
    657,609.78x = 322,892,442,707.44
  5. Step 5: Solve for x
    x = 322,892,442,707.44/657,609.78
  6. Step 6: Final answer
    x = 491,009.19

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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.