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Finding the Fourth Proportional to 2,486.90, 3,430.15 and 1,602.99

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Solution

The fourth proportional to 2,486.90, 3,430.15 and 1,602.99 is: 2,210.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.90 : 3,430.15 = 1,602.99 : x
  2. Step 2: Convert to fraction form
    2,486.90/3,430.15 = 1,602.99/x
  3. Step 3: Cross multiply
    2,486.90x = 3,430.15 × 1,602.99
  4. Step 4: Simplify right side
    2,486.90x = 5,498,492.14
  5. Step 5: Solve for x
    x = 5,498,492.14/2,486.90
  6. Step 6: Final answer
    x = 2,210.98

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1.5x scale

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.