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Finding the Fourth Proportional to 319,038.20, 478,442.10 and 161,214.20

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Solution

The fourth proportional to 319,038.20, 478,442.10 and 161,214.20 is: 241,763.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,038.20 : 478,442.10 = 161,214.20 : x
  2. Step 2: Convert to fraction form
    319,038.20/478,442.10 = 161,214.20/x
  3. Step 3: Cross multiply
    319,038.20x = 478,442.10 × 161,214.20
  4. Step 4: Simplify right side
    319,038.20x = 77,131,660,397.82
  5. Step 5: Solve for x
    x = 77,131,660,397.82/319,038.20
  6. Step 6: Final answer
    x = 241,763.09

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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.