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Finding the Fourth Proportional to 257,079.40, 385,619.10 and 255,329.80

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Solution

The fourth proportional to 257,079.40, 385,619.10 and 255,329.80 is: 382,994.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,079.40 : 385,619.10 = 255,329.80 : x
  2. Step 2: Convert to fraction form
    257,079.40/385,619.10 = 255,329.80/x
  3. Step 3: Cross multiply
    257,079.40x = 385,619.10 × 255,329.80
  4. Step 4: Simplify right side
    257,079.40x = 98,460,047,679.18
  5. Step 5: Solve for x
    x = 98,460,047,679.18/257,079.40
  6. Step 6: Final answer
    x = 382,994.70

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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.