Home / 1,178,995.55-1,768,866.98-420,820.21

Finding the Fourth Proportional to 1,178,995.55, 1,768,866.98 and 420,820.21

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Solution

The fourth proportional to 1,178,995.55, 1,768,866.98 and 420,820.21 is: 631,363.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178,995.55 : 1,768,866.98 = 420,820.21 : x
  2. Step 2: Convert to fraction form
    1,178,995.55/1,768,866.98 = 420,820.21/x
  3. Step 3: Cross multiply
    1,178,995.55x = 1,768,866.98 × 420,820.21
  4. Step 4: Simplify right side
    1,178,995.55x = 744,374,973,985.67
  5. Step 5: Solve for x
    x = 744,374,973,985.67/1,178,995.55
  6. Step 6: Final answer
    x = 631,363.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.