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Finding the Fourth Proportional to 303,318.64, 455,031.96 and 103,661.20

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Solution

The fourth proportional to 303,318.64, 455,031.96 and 103,661.20 is: 155,510.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,318.64 : 455,031.96 = 103,661.20 : x
  2. Step 2: Convert to fraction form
    303,318.64/455,031.96 = 103,661.20/x
  3. Step 3: Cross multiply
    303,318.64x = 455,031.96 × 103,661.20
  4. Step 4: Simplify right side
    303,318.64x = 47,169,159,011.95
  5. Step 5: Solve for x
    x = 47,169,159,011.95/303,318.64
  6. Step 6: Final answer
    x = 155,510.25

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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.