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Finding the Fourth Proportional to 490,055.40, 686,777.40 and 490,055.40

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Solution

The fourth proportional to 490,055.40, 686,777.40 and 490,055.40 is: 686,777.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,055.40 : 686,777.40 = 490,055.40 : x
  2. Step 2: Convert to fraction form
    490,055.40/686,777.40 = 490,055.40/x
  3. Step 3: Cross multiply
    490,055.40x = 686,777.40 × 490,055.40
  4. Step 4: Simplify right side
    490,055.40x = 336,558,973,467.96
  5. Step 5: Solve for x
    x = 336,558,973,467.96/490,055.40
  6. Step 6: Final answer
    x = 686,777.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.