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Finding the Fourth Proportional to 493,454.80, 740,009.40 and 256,718.80

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Solution

The fourth proportional to 493,454.80, 740,009.40 and 256,718.80 is: 384,988.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,454.80 : 740,009.40 = 256,718.80 : x
  2. Step 2: Convert to fraction form
    493,454.80/740,009.40 = 256,718.80/x
  3. Step 3: Cross multiply
    493,454.80x = 740,009.40 × 256,718.80
  4. Step 4: Simplify right side
    493,454.80x = 189,974,325,156.72
  5. Step 5: Solve for x
    x = 189,974,325,156.72/493,454.80
  6. Step 6: Final answer
    x = 384,988.30

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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.