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Finding the Fourth Proportional to 656,661.40, 906,192.72 and 354,855.40

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Solution

The fourth proportional to 656,661.40, 906,192.72 and 354,855.40 is: 489,700.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,661.40 : 906,192.72 = 354,855.40 : x
  2. Step 2: Convert to fraction form
    656,661.40/906,192.72 = 354,855.40/x
  3. Step 3: Cross multiply
    656,661.40x = 906,192.72 × 354,855.40
  4. Step 4: Simplify right side
    656,661.40x = 321,567,380,132.69
  5. Step 5: Solve for x
    x = 321,567,380,132.69/656,661.40
  6. Step 6: Final answer
    x = 489,700.45

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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.