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Finding the Fourth Proportional to 390,720.83, 586,093.19 and 134,550.63

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Solution

The fourth proportional to 390,720.83, 586,093.19 and 134,550.63 is: 201,830.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,720.83 : 586,093.19 = 134,550.63 : x
  2. Step 2: Convert to fraction form
    390,720.83/586,093.19 = 134,550.63/x
  3. Step 3: Cross multiply
    390,720.83x = 586,093.19 × 134,550.63
  4. Step 4: Simplify right side
    390,720.83x = 78,859,207,280.46
  5. Step 5: Solve for x
    x = 78,859,207,280.46/390,720.83
  6. Step 6: Final answer
    x = 201,830.06

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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.