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Finding the Fourth Proportional to 328,116.47, 492,215.76 and 128,411.06

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Solution

The fourth proportional to 328,116.47, 492,215.76 and 128,411.06 is: 192,632.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,116.47 : 492,215.76 = 128,411.06 : x
  2. Step 2: Convert to fraction form
    328,116.47/492,215.76 = 128,411.06/x
  3. Step 3: Cross multiply
    328,116.47x = 492,215.76 × 128,411.06
  4. Step 4: Simplify right side
    328,116.47x = 63,205,945,029.23
  5. Step 5: Solve for x
    x = 63,205,945,029.23/328,116.47
  6. Step 6: Final answer
    x = 192,632.65

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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.