Home / 1,478.64-2,215.65-929.67

Finding the Fourth Proportional to 1,478.64, 2,215.65 and 929.67

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Solution

The fourth proportional to 1,478.64, 2,215.65 and 929.67 is: 1,393.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.64 : 2,215.65 = 929.67 : x
  2. Step 2: Convert to fraction form
    1,478.64/2,215.65 = 929.67/x
  3. Step 3: Cross multiply
    1,478.64x = 2,215.65 × 929.67
  4. Step 4: Simplify right side
    1,478.64x = 2,059,824.23
  5. Step 5: Solve for x
    x = 2,059,824.23/1,478.64
  6. Step 6: Final answer
    x = 1,393.05

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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.