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Finding the Fourth Proportional to 439,490.48, 657,990.48 and 289,279.04

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Solution

The fourth proportional to 439,490.48, 657,990.48 and 289,279.04 is: 433,098.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,490.48 : 657,990.48 = 289,279.04 : x
  2. Step 2: Convert to fraction form
    439,490.48/657,990.48 = 289,279.04/x
  3. Step 3: Cross multiply
    439,490.48x = 657,990.48 × 289,279.04
  4. Step 4: Simplify right side
    439,490.48x = 190,342,854,383.54
  5. Step 5: Solve for x
    x = 190,342,854,383.54/439,490.48
  6. Step 6: Final answer
    x = 433,098.92

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1.5x scale

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.