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Finding the Fourth Proportional to 493,456.80, 740,012.40 and 256,720.80

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Solution

The fourth proportional to 493,456.80, 740,012.40 and 256,720.80 is: 384,991.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,456.80 : 740,012.40 = 256,720.80 : x
  2. Step 2: Convert to fraction form
    493,456.80/740,012.40 = 256,720.80/x
  3. Step 3: Cross multiply
    493,456.80x = 740,012.40 × 256,720.80
  4. Step 4: Simplify right side
    493,456.80x = 189,976,575,337.92
  5. Step 5: Solve for x
    x = 189,976,575,337.92/493,456.80
  6. Step 6: Final answer
    x = 384,991.30

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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.