Home / 687,076.40-1,029,059.40-407,140.40

Finding the Fourth Proportional to 687,076.40, 1,029,059.40 and 407,140.40

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Solution

The fourth proportional to 687,076.40, 1,029,059.40 and 407,140.40 is: 609,789.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,076.40 : 1,029,059.40 = 407,140.40 : x
  2. Step 2: Convert to fraction form
    687,076.40/1,029,059.40 = 407,140.40/x
  3. Step 3: Cross multiply
    687,076.40x = 1,029,059.40 × 407,140.40
  4. Step 4: Simplify right side
    687,076.40x = 418,971,655,739.76
  5. Step 5: Solve for x
    x = 418,971,655,739.76/687,076.40
  6. Step 6: Final answer
    x = 609,789.04

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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.