Home / 1,380,780.51-1,904,495.53-921,663.60

Finding the Fourth Proportional to 1,380,780.51, 1,904,495.53 and 921,663.60

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Solution

The fourth proportional to 1,380,780.51, 1,904,495.53 and 921,663.60 is: 1,271,240.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,780.51 : 1,904,495.53 = 921,663.60 : x
  2. Step 2: Convert to fraction form
    1,380,780.51/1,904,495.53 = 921,663.60/x
  3. Step 3: Cross multiply
    1,380,780.51x = 1,904,495.53 × 921,663.60
  4. Step 4: Simplify right side
    1,380,780.51x = 1,755,304,206,363.71
  5. Step 5: Solve for x
    x = 1,755,304,206,363.71/1,380,780.51
  6. Step 6: Final answer
    x = 1,271,240.57

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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.