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Finding the Fourth Proportional to 319,364,034.40, 479,046,051.60 and 287,052,421.60

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Solution

The fourth proportional to 319,364,034.40, 479,046,051.60 and 287,052,421.60 is: 430,578,632.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,364,034.40 : 479,046,051.60 = 287,052,421.60 : x
  2. Step 2: Convert to fraction form
    319,364,034.40/479,046,051.60 = 287,052,421.60/x
  3. Step 3: Cross multiply
    319,364,034.40x = 479,046,051.60 × 287,052,421.60
  4. Step 4: Simplify right side
    319,364,034.40x = 137,511,329,169,698,576
  5. Step 5: Solve for x
    x = 137,511,329,169,698,576/319,364,034.40
  6. Step 6: Final answer
    x = 430,578,632.40

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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.