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Finding the Fourth Proportional to 328,555.72, 492,886.74 and 128,767.76

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Solution

The fourth proportional to 328,555.72, 492,886.74 and 128,767.76 is: 193,172.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,555.72 : 492,886.74 = 128,767.76 : x
  2. Step 2: Convert to fraction form
    328,555.72/492,886.74 = 128,767.76/x
  3. Step 3: Cross multiply
    328,555.72x = 492,886.74 × 128,767.76
  4. Step 4: Simplify right side
    328,555.72x = 63,467,921,443.50
  5. Step 5: Solve for x
    x = 63,467,921,443.50/328,555.72
  6. Step 6: Final answer
    x = 193,172.47

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1.5x scale

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.