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Finding the Fourth Proportional to 353,457, 487,609.20 and 210,135.60

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Solution

The fourth proportional to 353,457, 487,609.20 and 210,135.60 is: 289,891.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,457 : 487,609.20 = 210,135.60 : x
  2. Step 2: Convert to fraction form
    353,457/487,609.20 = 210,135.60/x
  3. Step 3: Cross multiply
    353,457x = 487,609.20 × 210,135.60
  4. Step 4: Simplify right side
    353,457x = 102,464,051,807.52
  5. Step 5: Solve for x
    x = 102,464,051,807.52/353,457
  6. Step 6: Final answer
    x = 289,891.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.