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Finding the Fourth Proportional to 493,448.80, 740,000.40 and 256,712.80

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Solution

The fourth proportional to 493,448.80, 740,000.40 and 256,712.80 is: 384,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,448.80 : 740,000.40 = 256,712.80 : x
  2. Step 2: Convert to fraction form
    493,448.80/740,000.40 = 256,712.80/x
  3. Step 3: Cross multiply
    493,448.80x = 740,000.40 × 256,712.80
  4. Step 4: Simplify right side
    493,448.80x = 189,967,574,685.12
  5. Step 5: Solve for x
    x = 189,967,574,685.12/493,448.80
  6. Step 6: Final answer
    x = 384,979.30

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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.