Home / 515,429.68-711,290.82-289,075.18

Finding the Fourth Proportional to 515,429.68, 711,290.82 and 289,075.18

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Solution

The fourth proportional to 515,429.68, 711,290.82 and 289,075.18 is: 398,922.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,429.68 : 711,290.82 = 289,075.18 : x
  2. Step 2: Convert to fraction form
    515,429.68/711,290.82 = 289,075.18/x
  3. Step 3: Cross multiply
    515,429.68x = 711,290.82 × 289,075.18
  4. Step 4: Simplify right side
    515,429.68x = 205,616,521,823.85
  5. Step 5: Solve for x
    x = 205,616,521,823.85/515,429.68
  6. Step 6: Final answer
    x = 398,922.55

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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.