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Finding the Fourth Proportional to 328,576.32, 492,864.48 and 128,990.70

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Solution

The fourth proportional to 328,576.32, 492,864.48 and 128,990.70 is: 193,486.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,576.32 : 492,864.48 = 128,990.70 : x
  2. Step 2: Convert to fraction form
    328,576.32/492,864.48 = 128,990.70/x
  3. Step 3: Cross multiply
    328,576.32x = 492,864.48 × 128,990.70
  4. Step 4: Simplify right side
    328,576.32x = 63,574,934,280.34
  5. Step 5: Solve for x
    x = 63,574,934,280.34/328,576.32
  6. Step 6: Final answer
    x = 193,486.05

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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.