Home / 428,237,920.64-642,232,264.79-165,863,952.38

Finding the Fourth Proportional to 428,237,920.64, 642,232,264.79 and 165,863,952.38

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Solution

The fourth proportional to 428,237,920.64, 642,232,264.79 and 165,863,952.38 is: 248,747,662.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,237,920.64 : 642,232,264.79 = 165,863,952.38 : x
  2. Step 2: Convert to fraction form
    428,237,920.64/642,232,264.79 = 165,863,952.38/x
  3. Step 3: Cross multiply
    428,237,920.64x = 642,232,264.79 × 165,863,952.38
  4. Step 4: Simplify right side
    428,237,920.64x = 106,523,181,786,048,352
  5. Step 5: Solve for x
    x = 106,523,181,786,048,352/428,237,920.64
  6. Step 6: Final answer
    x = 248,747,662.58

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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.