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Finding the Fourth Proportional to 586,321.39, 809,123.34 and 318,049.39

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Solution

The fourth proportional to 586,321.39, 809,123.34 and 318,049.39 is: 438,908.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,321.39 : 809,123.34 = 318,049.39 : x
  2. Step 2: Convert to fraction form
    586,321.39/809,123.34 = 318,049.39/x
  3. Step 3: Cross multiply
    586,321.39x = 809,123.34 × 318,049.39
  4. Step 4: Simplify right side
    586,321.39x = 257,341,184,721.76
  5. Step 5: Solve for x
    x = 257,341,184,721.76/586,321.39
  6. Step 6: Final answer
    x = 438,908.06

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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.