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Finding the Fourth Proportional to 328,300.15, 492,108.80 and 138,602.20

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Solution

The fourth proportional to 328,300.15, 492,108.80 and 138,602.20 is: 207,759.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,300.15 : 492,108.80 = 138,602.20 : x
  2. Step 2: Convert to fraction form
    328,300.15/492,108.80 = 138,602.20/x
  3. Step 3: Cross multiply
    328,300.15x = 492,108.80 × 138,602.20
  4. Step 4: Simplify right side
    328,300.15x = 68,207,362,319.36
  5. Step 5: Solve for x
    x = 68,207,362,319.36/328,300.15
  6. Step 6: Final answer
    x = 207,759.16

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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.