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Finding the Fourth Proportional to 518,336.85, 777,505.28 and 429,763.35

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Solution

The fourth proportional to 518,336.85, 777,505.28 and 429,763.35 is: 644,645.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,336.85 : 777,505.28 = 429,763.35 : x
  2. Step 2: Convert to fraction form
    518,336.85/777,505.28 = 429,763.35/x
  3. Step 3: Cross multiply
    518,336.85x = 777,505.28 × 429,763.35
  4. Step 4: Simplify right side
    518,336.85x = 334,143,271,626.67
  5. Step 5: Solve for x
    x = 334,143,271,626.67/518,336.85
  6. Step 6: Final answer
    x = 644,645.03

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Double scale
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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.