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Finding the Fourth Proportional to 879,147, 1,213,222.86 and 476,739.32

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Solution

The fourth proportional to 879,147, 1,213,222.86 and 476,739.32 is: 657,900.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,147 : 1,213,222.86 = 476,739.32 : x
  2. Step 2: Convert to fraction form
    879,147/1,213,222.86 = 476,739.32/x
  3. Step 3: Cross multiply
    879,147x = 1,213,222.86 × 476,739.32
  4. Step 4: Simplify right side
    879,147x = 578,391,041,284.86
  5. Step 5: Solve for x
    x = 578,391,041,284.86/879,147
  6. Step 6: Final answer
    x = 657,900.26

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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.