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Finding the Fourth Proportional to 1,420,130.03, 1,959,795.05 and 775,569.20

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Solution

The fourth proportional to 1,420,130.03, 1,959,795.05 and 775,569.20 is: 1,070,294.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420,130.03 : 1,959,795.05 = 775,569.20 : x
  2. Step 2: Convert to fraction form
    1,420,130.03/1,959,795.05 = 775,569.20/x
  3. Step 3: Cross multiply
    1,420,130.03x = 1,959,795.05 × 775,569.20
  4. Step 4: Simplify right side
    1,420,130.03x = 1,519,956,665,415.64
  5. Step 5: Solve for x
    x = 1,519,956,665,415.64/1,420,130.03
  6. Step 6: Final answer
    x = 1,070,294.01

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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.