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Finding the Fourth Proportional to 874,892,561.40, 1,312,338,842.10 and 808,379,767.80

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Solution

The fourth proportional to 874,892,561.40, 1,312,338,842.10 and 808,379,767.80 is: 1,212,569,651.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,892,561.40 : 1,312,338,842.10 = 808,379,767.80 : x
  2. Step 2: Convert to fraction form
    874,892,561.40/1,312,338,842.10 = 808,379,767.80/x
  3. Step 3: Cross multiply
    874,892,561.40x = 1,312,338,842.10 × 808,379,767.80
  4. Step 4: Simplify right side
    874,892,561.40x = 1,060,868,168,451,718,784
  5. Step 5: Solve for x
    x = 1,060,868,168,451,718,784/874,892,561.40
  6. Step 6: Final answer
    x = 1,212,569,651.70

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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.