Home / 428,840.19-642,448.34-286,255.53

Finding the Fourth Proportional to 428,840.19, 642,448.34 and 286,255.53

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Solution

The fourth proportional to 428,840.19, 642,448.34 and 286,255.53 is: 428,841.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,840.19 : 642,448.34 = 286,255.53 : x
  2. Step 2: Convert to fraction form
    428,840.19/642,448.34 = 286,255.53/x
  3. Step 3: Cross multiply
    428,840.19x = 642,448.34 × 286,255.53
  4. Step 4: Simplify right side
    428,840.19x = 183,904,390,064.32
  5. Step 5: Solve for x
    x = 183,904,390,064.32/428,840.19
  6. Step 6: Final answer
    x = 428,841.31

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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.