Home / 778,515.93-1,074,383.87-491,931.45

Finding the Fourth Proportional to 778,515.93, 1,074,383.87 and 491,931.45

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Solution

The fourth proportional to 778,515.93, 1,074,383.87 and 491,931.45 is: 678,885.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,515.93 : 1,074,383.87 = 491,931.45 : x
  2. Step 2: Convert to fraction form
    778,515.93/1,074,383.87 = 491,931.45/x
  3. Step 3: Cross multiply
    778,515.93x = 1,074,383.87 × 491,931.45
  4. Step 4: Simplify right side
    778,515.93x = 528,523,212,566.05
  5. Step 5: Solve for x
    x = 528,523,212,566.05/778,515.93
  6. Step 6: Final answer
    x = 678,885.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.