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Finding the Fourth Proportional to 493,457.80, 740,013.90 and 256,721.80

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Solution

The fourth proportional to 493,457.80, 740,013.90 and 256,721.80 is: 384,992.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,457.80 : 740,013.90 = 256,721.80 : x
  2. Step 2: Convert to fraction form
    493,457.80/740,013.90 = 256,721.80/x
  3. Step 3: Cross multiply
    493,457.80x = 740,013.90 × 256,721.80
  4. Step 4: Simplify right side
    493,457.80x = 189,977,700,433.02
  5. Step 5: Solve for x
    x = 189,977,700,433.02/493,457.80
  6. Step 6: Final answer
    x = 384,992.80

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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.