Home / 1,380,700.63-1,905,365.86-807,851.21

Finding the Fourth Proportional to 1,380,700.63, 1,905,365.86 and 807,851.21

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Solution

The fourth proportional to 1,380,700.63, 1,905,365.86 and 807,851.21 is: 1,114,834.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,700.63 : 1,905,365.86 = 807,851.21 : x
  2. Step 2: Convert to fraction form
    1,380,700.63/1,905,365.86 = 807,851.21/x
  3. Step 3: Cross multiply
    1,380,700.63x = 1,905,365.86 × 807,851.21
  4. Step 4: Simplify right side
    1,380,700.63x = 1,539,252,118,237.48
  5. Step 5: Solve for x
    x = 1,539,252,118,237.48/1,380,700.63
  6. Step 6: Final answer
    x = 1,114,834.08

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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.