Home / 1,380,772.12-1,904,484-921,655.21

Finding the Fourth Proportional to 1,380,772.12, 1,904,484 and 921,655.21

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Solution

The fourth proportional to 1,380,772.12, 1,904,484 and 921,655.21 is: 1,271,229.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,772.12 : 1,904,484 = 921,655.21 : x
  2. Step 2: Convert to fraction form
    1,380,772.12/1,904,484 = 921,655.21/x
  3. Step 3: Cross multiply
    1,380,772.12x = 1,904,484 × 921,655.21
  4. Step 4: Simplify right side
    1,380,772.12x = 1,755,277,600,961.64
  5. Step 5: Solve for x
    x = 1,755,277,600,961.64/1,380,772.12
  6. Step 6: Final answer
    x = 1,271,229.03

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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.