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Finding the Fourth Proportional to 656,874.32, 906,485.88 and 355,068.32

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Solution

The fourth proportional to 656,874.32, 906,485.88 and 355,068.32 is: 489,993.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,874.32 : 906,485.88 = 355,068.32 : x
  2. Step 2: Convert to fraction form
    656,874.32/906,485.88 = 355,068.32/x
  3. Step 3: Cross multiply
    656,874.32x = 906,485.88 × 355,068.32
  4. Step 4: Simplify right side
    656,874.32x = 321,864,418,515.32
  5. Step 5: Solve for x
    x = 321,864,418,515.32/656,874.32
  6. Step 6: Final answer
    x = 489,993.91

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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.