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Finding the Fourth Proportional to 510,207.60, 765,311.40 and 447,999.60

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Solution

The fourth proportional to 510,207.60, 765,311.40 and 447,999.60 is: 671,999.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    510,207.60 : 765,311.40 = 447,999.60 : x
  2. Step 2: Convert to fraction form
    510,207.60/765,311.40 = 447,999.60/x
  3. Step 3: Cross multiply
    510,207.60x = 765,311.40 × 447,999.60
  4. Step 4: Simplify right side
    510,207.60x = 342,859,201,075.44
  5. Step 5: Solve for x
    x = 342,859,201,075.44/510,207.60
  6. Step 6: Final answer
    x = 671,999.40

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Similar ratio
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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.