Home / 3,421.90-4,721.87-1,985.77

Finding the Fourth Proportional to 3,421.90, 4,721.87 and 1,985.77

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Solution

The fourth proportional to 3,421.90, 4,721.87 and 1,985.77 is: 2,740.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.90 : 4,721.87 = 1,985.77 : x
  2. Step 2: Convert to fraction form
    3,421.90/4,721.87 = 1,985.77/x
  3. Step 3: Cross multiply
    3,421.90x = 4,721.87 × 1,985.77
  4. Step 4: Simplify right side
    3,421.90x = 9,376,526.51
  5. Step 5: Solve for x
    x = 9,376,526.51/3,421.90
  6. Step 6: Final answer
    x = 2,740.16

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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.