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Finding the Fourth Proportional to 319,719.40, 448,436.60 and 319,719.40

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Solution

The fourth proportional to 319,719.40, 448,436.60 and 319,719.40 is: 448,436.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,719.40 : 448,436.60 = 319,719.40 : x
  2. Step 2: Convert to fraction form
    319,719.40/448,436.60 = 319,719.40/x
  3. Step 3: Cross multiply
    319,719.40x = 448,436.60 × 319,719.40
  4. Step 4: Simplify right side
    319,719.40x = 143,373,880,690.04
  5. Step 5: Solve for x
    x = 143,373,880,690.04/319,719.40
  6. Step 6: Final answer
    x = 448,436.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.