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Finding the Fourth Proportional to 328,303.30, 492,090.45 and 128,557.30

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Solution

The fourth proportional to 328,303.30, 492,090.45 and 128,557.30 is: 192,693.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,303.30 : 492,090.45 = 128,557.30 : x
  2. Step 2: Convert to fraction form
    328,303.30/492,090.45 = 128,557.30/x
  3. Step 3: Cross multiply
    328,303.30x = 492,090.45 × 128,557.30
  4. Step 4: Simplify right side
    328,303.30x = 63,261,819,607.79
  5. Step 5: Solve for x
    x = 63,261,819,607.79/328,303.30
  6. Step 6: Final answer
    x = 192,693.22

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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.