Home / 687,074.40-1,029,056.40-407,138.40

Finding the Fourth Proportional to 687,074.40, 1,029,056.40 and 407,138.40

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Solution

The fourth proportional to 687,074.40, 1,029,056.40 and 407,138.40 is: 609,786.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,074.40 : 1,029,056.40 = 407,138.40 : x
  2. Step 2: Convert to fraction form
    687,074.40/1,029,056.40 = 407,138.40/x
  3. Step 3: Cross multiply
    687,074.40x = 1,029,056.40 × 407,138.40
  4. Step 4: Simplify right side
    687,074.40x = 418,968,376,205.76
  5. Step 5: Solve for x
    x = 418,968,376,205.76/687,074.40
  6. Step 6: Final answer
    x = 609,786.04

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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.