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Finding the Fourth Proportional to 315,316.59, 435,146.07 and 172,085.91

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Solution

The fourth proportional to 315,316.59, 435,146.07 and 172,085.91 is: 237,483.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,316.59 : 435,146.07 = 172,085.91 : x
  2. Step 2: Convert to fraction form
    315,316.59/435,146.07 = 172,085.91/x
  3. Step 3: Cross multiply
    315,316.59x = 435,146.07 × 172,085.91
  4. Step 4: Simplify right side
    315,316.59x = 74,882,507,438.87
  5. Step 5: Solve for x
    x = 74,882,507,438.87/315,316.59
  6. Step 6: Final answer
    x = 237,483.56

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Why These Related Problems?

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