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Finding the Fourth Proportional to 490,327.94, 734,802.60 and 390,043.46

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Solution

The fourth proportional to 490,327.94, 734,802.60 and 390,043.46 is: 584,516.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,327.94 : 734,802.60 = 390,043.46 : x
  2. Step 2: Convert to fraction form
    490,327.94/734,802.60 = 390,043.46/x
  3. Step 3: Cross multiply
    490,327.94x = 734,802.60 × 390,043.46
  4. Step 4: Simplify right side
    490,327.94x = 286,604,948,521.00
  5. Step 5: Solve for x
    x = 286,604,948,521.00/490,327.94
  6. Step 6: Final answer
    x = 584,516.86

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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.