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Finding the Fourth Proportional to 879,138, 1,213,210.44 and 476,730.32

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Solution

The fourth proportional to 879,138, 1,213,210.44 and 476,730.32 is: 657,887.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,138 : 1,213,210.44 = 476,730.32 : x
  2. Step 2: Convert to fraction form
    879,138/1,213,210.44 = 476,730.32/x
  3. Step 3: Cross multiply
    879,138x = 1,213,210.44 × 476,730.32
  4. Step 4: Simplify right side
    879,138x = 578,374,201,288.54
  5. Step 5: Solve for x
    x = 578,374,201,288.54/879,138
  6. Step 6: Final answer
    x = 657,887.84

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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.