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Finding the Fourth Proportional to 328,386.20, 492,579.30 and 118,045.40

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Solution

The fourth proportional to 328,386.20, 492,579.30 and 118,045.40 is: 177,068.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,386.20 : 492,579.30 = 118,045.40 : x
  2. Step 2: Convert to fraction form
    328,386.20/492,579.30 = 118,045.40/x
  3. Step 3: Cross multiply
    328,386.20x = 492,579.30 × 118,045.40
  4. Step 4: Simplify right side
    328,386.20x = 58,146,720,500.22
  5. Step 5: Solve for x
    x = 58,146,720,500.22/328,386.20
  6. Step 6: Final answer
    x = 177,068.10

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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.