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Finding the Fourth Proportional to 1,989.71, 2,985.01 and 603.08

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Solution

The fourth proportional to 1,989.71, 2,985.01 and 603.08 is: 904.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.71 : 2,985.01 = 603.08 : x
  2. Step 2: Convert to fraction form
    1,989.71/2,985.01 = 603.08/x
  3. Step 3: Cross multiply
    1,989.71x = 2,985.01 × 603.08
  4. Step 4: Simplify right side
    1,989.71x = 1,800,199.83
  5. Step 5: Solve for x
    x = 1,800,199.83/1,989.71
  6. Step 6: Final answer
    x = 904.76

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1.5x scale

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.