Home / 428,526.10-642,795.63-162,215.11

Finding the Fourth Proportional to 428,526.10, 642,795.63 and 162,215.11

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Solution

The fourth proportional to 428,526.10, 642,795.63 and 162,215.11 is: 243,325.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,526.10 : 642,795.63 = 162,215.11 : x
  2. Step 2: Convert to fraction form
    428,526.10/642,795.63 = 162,215.11/x
  3. Step 3: Cross multiply
    428,526.10x = 642,795.63 × 162,215.11
  4. Step 4: Simplify right side
    428,526.10x = 104,271,163,827.97
  5. Step 5: Solve for x
    x = 104,271,163,827.97/428,526.10
  6. Step 6: Final answer
    x = 243,325.12

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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.