Home / 1,385,479.31-1,913,281.85-1,309,999.09

Finding the Fourth Proportional to 1,385,479.31, 1,913,281.85 and 1,309,999.09

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Solution

The fourth proportional to 1,385,479.31, 1,913,281.85 and 1,309,999.09 is: 1,809,047.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,479.31 : 1,913,281.85 = 1,309,999.09 : x
  2. Step 2: Convert to fraction form
    1,385,479.31/1,913,281.85 = 1,309,999.09/x
  3. Step 3: Cross multiply
    1,385,479.31x = 1,913,281.85 × 1,309,999.09
  4. Step 4: Simplify right side
    1,385,479.31x = 2,506,397,482,413.52
  5. Step 5: Solve for x
    x = 2,506,397,482,413.52/1,385,479.31
  6. Step 6: Final answer
    x = 1,809,047.21

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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.