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Finding the Fourth Proportional to 879,279.20, 1,213,413 and 476,871.20

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Solution

The fourth proportional to 879,279.20, 1,213,413 and 476,871.20 is: 658,086.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,279.20 : 1,213,413 = 476,871.20 : x
  2. Step 2: Convert to fraction form
    879,279.20/1,213,413 = 476,871.20/x
  3. Step 3: Cross multiply
    879,279.20x = 1,213,413 × 476,871.20
  4. Step 4: Simplify right side
    879,279.20x = 578,641,713,405.60
  5. Step 5: Solve for x
    x = 578,641,713,405.60/879,279.20
  6. Step 6: Final answer
    x = 658,086.43

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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.