Home / 428,638.60-642,984.63-113,095.81

Finding the Fourth Proportional to 428,638.60, 642,984.63 and 113,095.81

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Solution

The fourth proportional to 428,638.60, 642,984.63 and 113,095.81 is: 169,650.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,638.60 : 642,984.63 = 113,095.81 : x
  2. Step 2: Convert to fraction form
    428,638.60/642,984.63 = 113,095.81/x
  3. Step 3: Cross multiply
    428,638.60x = 642,984.63 × 113,095.81
  4. Step 4: Simplify right side
    428,638.60x = 72,718,867,547.40
  5. Step 5: Solve for x
    x = 72,718,867,547.40/428,638.60
  6. Step 6: Final answer
    x = 169,650.77

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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.