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Finding the Fourth Proportional to 286,018.47, 428,955.66 and 117,585.72

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Solution

The fourth proportional to 286,018.47, 428,955.66 and 117,585.72 is: 176,348.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,018.47 : 428,955.66 = 117,585.72 : x
  2. Step 2: Convert to fraction form
    286,018.47/428,955.66 = 117,585.72/x
  3. Step 3: Cross multiply
    286,018.47x = 428,955.66 × 117,585.72
  4. Step 4: Simplify right side
    286,018.47x = 50,439,060,129.18
  5. Step 5: Solve for x
    x = 50,439,060,129.18/286,018.47
  6. Step 6: Final answer
    x = 176,348.96

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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.