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Finding the Fourth Proportional to 874,892,420.40, 1,312,338,630.60 and 808,379,626.80

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Solution

The fourth proportional to 874,892,420.40, 1,312,338,630.60 and 808,379,626.80 is: 1,212,569,440.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,892,420.40 : 1,312,338,630.60 = 808,379,626.80 : x
  2. Step 2: Convert to fraction form
    874,892,420.40/1,312,338,630.60 = 808,379,626.80/x
  3. Step 3: Cross multiply
    874,892,420.40x = 1,312,338,630.60 × 808,379,626.80
  4. Step 4: Simplify right side
    874,892,420.40x = 1,060,867,812,439,650,944
  5. Step 5: Solve for x
    x = 1,060,867,812,439,650,944/874,892,420.40
  6. Step 6: Final answer
    x = 1,212,569,440.20

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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.