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Finding the Fourth Proportional to 315,499.38, 435,386.94 and 172,258.98

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Solution

The fourth proportional to 315,499.38, 435,386.94 and 172,258.98 is: 237,716.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,499.38 : 435,386.94 = 172,258.98 : x
  2. Step 2: Convert to fraction form
    315,499.38/435,386.94 = 172,258.98/x
  3. Step 3: Cross multiply
    315,499.38x = 435,386.94 × 172,258.98
  4. Step 4: Simplify right side
    315,499.38x = 74,999,310,189.72
  5. Step 5: Solve for x
    x = 74,999,310,189.72/315,499.38
  6. Step 6: Final answer
    x = 237,716.19

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1.5x scale

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.