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Finding the Fourth Proportional to 657,039.48, 906,715.80 and 355,233.48

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Solution

The fourth proportional to 657,039.48, 906,715.80 and 355,233.48 is: 490,222.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,039.48 : 906,715.80 = 355,233.48 : x
  2. Step 2: Convert to fraction form
    657,039.48/906,715.80 = 355,233.48/x
  3. Step 3: Cross multiply
    657,039.48x = 906,715.80 × 355,233.48
  4. Step 4: Simplify right side
    657,039.48x = 322,095,809,004.98
  5. Step 5: Solve for x
    x = 322,095,809,004.98/657,039.48
  6. Step 6: Final answer
    x = 490,222.91

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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.