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Finding the Fourth Proportional to 318,402.99, 439,285.73 and 197,500.77

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Solution

The fourth proportional to 318,402.99, 439,285.73 and 197,500.77 is: 272,482.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,402.99 : 439,285.73 = 197,500.77 : x
  2. Step 2: Convert to fraction form
    318,402.99/439,285.73 = 197,500.77/x
  3. Step 3: Cross multiply
    318,402.99x = 439,285.73 × 197,500.77
  4. Step 4: Simplify right side
    318,402.99x = 86,759,269,925.01
  5. Step 5: Solve for x
    x = 86,759,269,925.01/318,402.99
  6. Step 6: Final answer
    x = 272,482.59

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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.