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Finding the Fourth Proportional to 355,526.50, 490,617.14 and 210,339.77

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Solution

The fourth proportional to 355,526.50, 490,617.14 and 210,339.77 is: 290,263.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,526.50 : 490,617.14 = 210,339.77 : x
  2. Step 2: Convert to fraction form
    355,526.50/490,617.14 = 210,339.77/x
  3. Step 3: Cross multiply
    355,526.50x = 490,617.14 × 210,339.77
  4. Step 4: Simplify right side
    355,526.50x = 103,196,298,138.05
  5. Step 5: Solve for x
    x = 103,196,298,138.05/355,526.50
  6. Step 6: Final answer
    x = 290,263.31

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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.