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Finding the Fourth Proportional to 657,300.06, 906,830.94 and 485,631.48

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Solution

The fourth proportional to 657,300.06, 906,830.94 and 485,631.48 is: 669,991.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,300.06 : 906,830.94 = 485,631.48 : x
  2. Step 2: Convert to fraction form
    657,300.06/906,830.94 = 485,631.48/x
  3. Step 3: Cross multiply
    657,300.06x = 906,830.94 × 485,631.48
  4. Step 4: Simplify right side
    657,300.06x = 440,385,651,501.99
  5. Step 5: Solve for x
    x = 440,385,651,501.99/657,300.06
  6. Step 6: Final answer
    x = 669,991.80

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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.