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Finding the Fourth Proportional to 318,007.64, 438,754.74 and 190,636.76

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Solution

The fourth proportional to 318,007.64, 438,754.74 and 190,636.76 is: 263,021.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,007.64 : 438,754.74 = 190,636.76 : x
  2. Step 2: Convert to fraction form
    318,007.64/438,754.74 = 190,636.76/x
  3. Step 3: Cross multiply
    318,007.64x = 438,754.74 × 190,636.76
  4. Step 4: Simplify right side
    318,007.64x = 83,642,782,068.24
  5. Step 5: Solve for x
    x = 83,642,782,068.24/318,007.64
  6. Step 6: Final answer
    x = 263,021.30

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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.