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Finding the Fourth Proportional to 355,402.08, 533,313.12 and 130,920

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Solution

The fourth proportional to 355,402.08, 533,313.12 and 130,920 is: 196,457.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,402.08 : 533,313.12 = 130,920 : x
  2. Step 2: Convert to fraction form
    355,402.08/533,313.12 = 130,920/x
  3. Step 3: Cross multiply
    355,402.08x = 533,313.12 × 130,920
  4. Step 4: Simplify right side
    355,402.08x = 69,821,353,670.40
  5. Step 5: Solve for x
    x = 69,821,353,670.40/355,402.08
  6. Step 6: Final answer
    x = 196,457.36

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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.