Home / 1,272,218.53-1,908,399.28-407,728.69

Finding the Fourth Proportional to 1,272,218.53, 1,908,399.28 and 407,728.69

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Solution

The fourth proportional to 1,272,218.53, 1,908,399.28 and 407,728.69 is: 611,615.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272,218.53 : 1,908,399.28 = 407,728.69 : x
  2. Step 2: Convert to fraction form
    1,272,218.53/1,908,399.28 = 407,728.69/x
  3. Step 3: Cross multiply
    1,272,218.53x = 1,908,399.28 × 407,728.69
  4. Step 4: Simplify right side
    1,272,218.53x = 778,109,128,889.35
  5. Step 5: Solve for x
    x = 778,109,128,889.35/1,272,218.53
  6. Step 6: Final answer
    x = 611,615.94

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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.