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Finding the Fourth Proportional to 874,359,619.80, 1,310,699,621.70 and 505,515,946.20

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Solution

The fourth proportional to 874,359,619.80, 1,310,699,621.70 and 505,515,946.20 is: 757,788,379.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,359,619.80 : 1,310,699,621.70 = 505,515,946.20 : x
  2. Step 2: Convert to fraction form
    874,359,619.80/1,310,699,621.70 = 505,515,946.20/x
  3. Step 3: Cross multiply
    874,359,619.80x = 1,310,699,621.70 × 505,515,946.20
  4. Step 4: Simplify right side
    874,359,619.80x = 662,579,559,447,657,600
  5. Step 5: Solve for x
    x = 662,579,559,447,657,600/874,359,619.80
  6. Step 6: Final answer
    x = 757,788,379.57

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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.