Home / 879,128.64-1,213,223.94-497,147.76

Finding the Fourth Proportional to 879,128.64, 1,213,223.94 and 497,147.76

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Solution

The fourth proportional to 879,128.64, 1,213,223.94 and 497,147.76 is: 686,078.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,128.64 : 1,213,223.94 = 497,147.76 : x
  2. Step 2: Convert to fraction form
    879,128.64/1,213,223.94 = 497,147.76/x
  3. Step 3: Cross multiply
    879,128.64x = 1,213,223.94 × 497,147.76
  4. Step 4: Simplify right side
    879,128.64x = 603,151,564,149.37
  5. Step 5: Solve for x
    x = 603,151,564,149.37/879,128.64
  6. Step 6: Final answer
    x = 686,078.85

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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.