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Finding the Fourth Proportional to 490,328.94, 734,804.10 and 390,044.46

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Solution

The fourth proportional to 490,328.94, 734,804.10 and 390,044.46 is: 584,518.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,328.94 : 734,804.10 = 390,044.46 : x
  2. Step 2: Convert to fraction form
    490,328.94/734,804.10 = 390,044.46/x
  3. Step 3: Cross multiply
    490,328.94x = 734,804.10 × 390,044.46
  4. Step 4: Simplify right side
    490,328.94x = 286,606,268,390.29
  5. Step 5: Solve for x
    x = 286,606,268,390.29/490,328.94
  6. Step 6: Final answer
    x = 584,518.36

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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.