Home / 428,837.69-642,444.59-286,253.03

Finding the Fourth Proportional to 428,837.69, 642,444.59 and 286,253.03

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Solution

The fourth proportional to 428,837.69, 642,444.59 and 286,253.03 is: 428,837.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,837.69 : 642,444.59 = 286,253.03 : x
  2. Step 2: Convert to fraction form
    428,837.69/642,444.59 = 286,253.03/x
  3. Step 3: Cross multiply
    428,837.69x = 642,444.59 × 286,253.03
  4. Step 4: Simplify right side
    428,837.69x = 183,901,705,851.12
  5. Step 5: Solve for x
    x = 183,901,705,851.12/428,837.69
  6. Step 6: Final answer
    x = 428,837.56

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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.