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Finding the Fourth Proportional to 292,339.80, 438,509.70 and 165,931.20

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Solution

The fourth proportional to 292,339.80, 438,509.70 and 165,931.20 is: 248,896.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,339.80 : 438,509.70 = 165,931.20 : x
  2. Step 2: Convert to fraction form
    292,339.80/438,509.70 = 165,931.20/x
  3. Step 3: Cross multiply
    292,339.80x = 438,509.70 × 165,931.20
  4. Step 4: Simplify right side
    292,339.80x = 72,762,440,732.64
  5. Step 5: Solve for x
    x = 72,762,440,732.64/292,339.80
  6. Step 6: Final answer
    x = 248,896.80

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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.