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Finding the Fourth Proportional to 310,636.08, 428,574.72 and 253,176.60

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Solution

The fourth proportional to 310,636.08, 428,574.72 and 253,176.60 is: 349,299.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,636.08 : 428,574.72 = 253,176.60 : x
  2. Step 2: Convert to fraction form
    310,636.08/428,574.72 = 253,176.60/x
  3. Step 3: Cross multiply
    310,636.08x = 428,574.72 × 253,176.60
  4. Step 4: Simplify right side
    310,636.08x = 108,505,090,455.55
  5. Step 5: Solve for x
    x = 108,505,090,455.55/310,636.08
  6. Step 6: Final answer
    x = 349,299.70

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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.