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Finding the Fourth Proportional to 699,843,710.80, 1,049,765,566.20 and 689,640,043.60

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Solution

The fourth proportional to 699,843,710.80, 1,049,765,566.20 and 689,640,043.60 is: 1,034,460,065.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,843,710.80 : 1,049,765,566.20 = 689,640,043.60 : x
  2. Step 2: Convert to fraction form
    699,843,710.80/1,049,765,566.20 = 689,640,043.60/x
  3. Step 3: Cross multiply
    699,843,710.80x = 1,049,765,566.20 × 689,640,043.60
  4. Step 4: Simplify right side
    699,843,710.80x = 723,960,370,843,946,752
  5. Step 5: Solve for x
    x = 723,960,370,843,946,752/699,843,710.80
  6. Step 6: Final answer
    x = 1,034,460,065.40

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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.