Home / 778,980.24-1,074,986.64-421,284.24

Finding the Fourth Proportional to 778,980.24, 1,074,986.64 and 421,284.24

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Solution

The fourth proportional to 778,980.24, 1,074,986.64 and 421,284.24 is: 581,368.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,980.24 : 1,074,986.64 = 421,284.24 : x
  2. Step 2: Convert to fraction form
    778,980.24/1,074,986.64 = 421,284.24/x
  3. Step 3: Cross multiply
    778,980.24x = 1,074,986.64 × 421,284.24
  4. Step 4: Simplify right side
    778,980.24x = 452,874,929,642.55
  5. Step 5: Solve for x
    x = 452,874,929,642.55/778,980.24
  6. Step 6: Final answer
    x = 581,368.96

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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.