Home / 428,271.72-642,188.84-158,386.20

Finding the Fourth Proportional to 428,271.72, 642,188.84 and 158,386.20

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Solution

The fourth proportional to 428,271.72, 642,188.84 and 158,386.20 is: 237,498.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,271.72 : 642,188.84 = 158,386.20 : x
  2. Step 2: Convert to fraction form
    428,271.72/642,188.84 = 158,386.20/x
  3. Step 3: Cross multiply
    428,271.72x = 642,188.84 × 158,386.20
  4. Step 4: Simplify right side
    428,271.72x = 101,713,850,050.01
  5. Step 5: Solve for x
    x = 101,713,850,050.01/428,271.72
  6. Step 6: Final answer
    x = 237,498.40

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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.