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Finding the Fourth Proportional to 219,439.28, 302,820 and 130,015.28

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Solution

The fourth proportional to 219,439.28, 302,820 and 130,015.28 is: 179,417.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,439.28 : 302,820 = 130,015.28 : x
  2. Step 2: Convert to fraction form
    219,439.28/302,820 = 130,015.28/x
  3. Step 3: Cross multiply
    219,439.28x = 302,820 × 130,015.28
  4. Step 4: Simplify right side
    219,439.28x = 39,371,227,089.60
  5. Step 5: Solve for x
    x = 39,371,227,089.60/219,439.28
  6. Step 6: Final answer
    x = 179,417.41

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.