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Finding the Fourth Proportional to 686,803.60, 1,030,205.40 and 660,559.60

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Solution

The fourth proportional to 686,803.60, 1,030,205.40 and 660,559.60 is: 990,839.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,803.60 : 1,030,205.40 = 660,559.60 : x
  2. Step 2: Convert to fraction form
    686,803.60/1,030,205.40 = 660,559.60/x
  3. Step 3: Cross multiply
    686,803.60x = 1,030,205.40 × 660,559.60
  4. Step 4: Simplify right side
    686,803.60x = 680,512,066,941.84
  5. Step 5: Solve for x
    x = 680,512,066,941.84/686,803.60
  6. Step 6: Final answer
    x = 990,839.40

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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.