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Finding the Fourth Proportional to 878,847.90, 1,212,809.67 and 476,439.90

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Solution

The fourth proportional to 878,847.90, 1,212,809.67 and 476,439.90 is: 657,486.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,847.90 : 1,212,809.67 = 476,439.90 : x
  2. Step 2: Convert to fraction form
    878,847.90/1,212,809.67 = 476,439.90/x
  3. Step 3: Cross multiply
    878,847.90x = 1,212,809.67 × 476,439.90
  4. Step 4: Simplify right side
    878,847.90x = 577,830,917,893.83
  5. Step 5: Solve for x
    x = 577,830,917,893.83/878,847.90
  6. Step 6: Final answer
    x = 657,486.83

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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.