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Finding the Fourth Proportional to 319,804.80, 480,014.40 and 162,211.20

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Solution

The fourth proportional to 319,804.80, 480,014.40 and 162,211.20 is: 243,472.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,804.80 : 480,014.40 = 162,211.20 : x
  2. Step 2: Convert to fraction form
    319,804.80/480,014.40 = 162,211.20/x
  3. Step 3: Cross multiply
    319,804.80x = 480,014.40 × 162,211.20
  4. Step 4: Simplify right side
    319,804.80x = 77,863,711,841.28
  5. Step 5: Solve for x
    x = 77,863,711,841.28/319,804.80
  6. Step 6: Final answer
    x = 243,472.62

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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.