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Finding the Fourth Proportional to 319,283.20, 478,521.60 and 161,555.20

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Solution

The fourth proportional to 319,283.20, 478,521.60 and 161,555.20 is: 242,128.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,283.20 : 478,521.60 = 161,555.20 : x
  2. Step 2: Convert to fraction form
    319,283.20/478,521.60 = 161,555.20/x
  3. Step 3: Cross multiply
    319,283.20x = 478,521.60 × 161,555.20
  4. Step 4: Simplify right side
    319,283.20x = 77,307,652,792.32
  5. Step 5: Solve for x
    x = 77,307,652,792.32/319,283.20
  6. Step 6: Final answer
    x = 242,128.78

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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.