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Finding the Fourth Proportional to 316,509.56, 474,128.40 and 147,797.18

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Solution

The fourth proportional to 316,509.56, 474,128.40 and 147,797.18 is: 221,398.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,509.56 : 474,128.40 = 147,797.18 : x
  2. Step 2: Convert to fraction form
    316,509.56/474,128.40 = 147,797.18/x
  3. Step 3: Cross multiply
    316,509.56x = 474,128.40 × 147,797.18
  4. Step 4: Simplify right side
    316,509.56x = 70,074,840,477.91
  5. Step 5: Solve for x
    x = 70,074,840,477.91/316,509.56
  6. Step 6: Final answer
    x = 221,398.81

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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.