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Finding the Fourth Proportional to 390,336.77, 583,901.31 and 311,604.77

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Solution

The fourth proportional to 390,336.77, 583,901.31 and 311,604.77 is: 466,126.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,336.77 : 583,901.31 = 311,604.77 : x
  2. Step 2: Convert to fraction form
    390,336.77/583,901.31 = 311,604.77/x
  3. Step 3: Cross multiply
    390,336.77x = 583,901.31 × 311,604.77
  4. Step 4: Simplify right side
    390,336.77x = 181,946,433,405.25
  5. Step 5: Solve for x
    x = 181,946,433,405.25/390,336.77
  6. Step 6: Final answer
    x = 466,126.81

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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.