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Finding the Fourth Proportional to 656,785.49, 906,363.56 and 354,979.49

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Solution

The fourth proportional to 656,785.49, 906,363.56 and 354,979.49 is: 489,871.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,785.49 : 906,363.56 = 354,979.49 : x
  2. Step 2: Convert to fraction form
    656,785.49/906,363.56 = 354,979.49/x
  3. Step 3: Cross multiply
    656,785.49x = 906,363.56 × 354,979.49
  4. Step 4: Simplify right side
    656,785.49x = 321,740,470,639.02
  5. Step 5: Solve for x
    x = 321,740,470,639.02/656,785.49
  6. Step 6: Final answer
    x = 489,871.47

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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.