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Finding the Fourth Proportional to 657,682.80, 986,783.40 and 258,255.60

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Solution

The fourth proportional to 657,682.80, 986,783.40 and 258,255.60 is: 387,485.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,682.80 : 986,783.40 = 258,255.60 : x
  2. Step 2: Convert to fraction form
    657,682.80/986,783.40 = 258,255.60/x
  3. Step 3: Cross multiply
    657,682.80x = 986,783.40 × 258,255.60
  4. Step 4: Simplify right side
    657,682.80x = 254,842,339,037.04
  5. Step 5: Solve for x
    x = 254,842,339,037.04/657,682.80
  6. Step 6: Final answer
    x = 387,485.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.