Home / 920,876.39-1,270,847.69-512,978.12

Finding the Fourth Proportional to 920,876.39, 1,270,847.69 and 512,978.12

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Solution

The fourth proportional to 920,876.39, 1,270,847.69 and 512,978.12 is: 707,931.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,876.39 : 1,270,847.69 = 512,978.12 : x
  2. Step 2: Convert to fraction form
    920,876.39/1,270,847.69 = 512,978.12/x
  3. Step 3: Cross multiply
    920,876.39x = 1,270,847.69 × 512,978.12
  4. Step 4: Simplify right side
    920,876.39x = 651,917,053,750.75
  5. Step 5: Solve for x
    x = 651,917,053,750.75/920,876.39
  6. Step 6: Final answer
    x = 707,931.12

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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.