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Finding the Fourth Proportional to 879,810, 1,214,137.80 and 477,402

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Solution

The fourth proportional to 879,810, 1,214,137.80 and 477,402 is: 658,814.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,810 : 1,214,137.80 = 477,402 : x
  2. Step 2: Convert to fraction form
    879,810/1,214,137.80 = 477,402/x
  3. Step 3: Cross multiply
    879,810x = 1,214,137.80 × 477,402
  4. Step 4: Simplify right side
    879,810x = 579,631,813,995.60
  5. Step 5: Solve for x
    x = 579,631,813,995.60/879,810
  6. Step 6: Final answer
    x = 658,814.76

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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.