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Finding the Fourth Proportional to 603,826.80, 904,703.40 and 393,356.40

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Solution

The fourth proportional to 603,826.80, 904,703.40 and 393,356.40 is: 589,359.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,826.80 : 904,703.40 = 393,356.40 : x
  2. Step 2: Convert to fraction form
    603,826.80/904,703.40 = 393,356.40/x
  3. Step 3: Cross multiply
    603,826.80x = 904,703.40 × 393,356.40
  4. Step 4: Simplify right side
    603,826.80x = 355,870,872,491.76
  5. Step 5: Solve for x
    x = 355,870,872,491.76/603,826.80
  6. Step 6: Final answer
    x = 589,359.19

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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.