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Finding the Fourth Proportional to 518,880.30, 778,320.45 and 315,926.70

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Solution

The fourth proportional to 518,880.30, 778,320.45 and 315,926.70 is: 473,890.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,880.30 : 778,320.45 = 315,926.70 : x
  2. Step 2: Convert to fraction form
    518,880.30/778,320.45 = 315,926.70/x
  3. Step 3: Cross multiply
    518,880.30x = 778,320.45 × 315,926.70
  4. Step 4: Simplify right side
    518,880.30x = 245,892,211,311.02
  5. Step 5: Solve for x
    x = 245,892,211,311.02/518,880.30
  6. Step 6: Final answer
    x = 473,890.05

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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.