Home / 1,458.42-2,009.28-1,389.30

Finding the Fourth Proportional to 1,458.42, 2,009.28 and 1,389.30

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Solution

The fourth proportional to 1,458.42, 2,009.28 and 1,389.30 is: 1,914.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,458.42 : 2,009.28 = 1,389.30 : x
  2. Step 2: Convert to fraction form
    1,458.42/2,009.28 = 1,389.30/x
  3. Step 3: Cross multiply
    1,458.42x = 2,009.28 × 1,389.30
  4. Step 4: Simplify right side
    1,458.42x = 2,791,492.70
  5. Step 5: Solve for x
    x = 2,791,492.70/1,458.42
  6. Step 6: Final answer
    x = 1,914.05

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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.