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Finding the Fourth Proportional to 355,339.80, 533,009.70 and 342,898.20

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Solution

The fourth proportional to 355,339.80, 533,009.70 and 342,898.20 is: 514,347.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,339.80 : 533,009.70 = 342,898.20 : x
  2. Step 2: Convert to fraction form
    355,339.80/533,009.70 = 342,898.20/x
  3. Step 3: Cross multiply
    355,339.80x = 533,009.70 × 342,898.20
  4. Step 4: Simplify right side
    355,339.80x = 182,768,066,712.54
  5. Step 5: Solve for x
    x = 182,768,066,712.54/355,339.80
  6. Step 6: Final answer
    x = 514,347.30

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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.