Home / 1,386,347.20-2,079,520.80-389,075.20

Finding the Fourth Proportional to 1,386,347.20, 2,079,520.80 and 389,075.20

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Solution

The fourth proportional to 1,386,347.20, 2,079,520.80 and 389,075.20 is: 583,612.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,347.20 : 2,079,520.80 = 389,075.20 : x
  2. Step 2: Convert to fraction form
    1,386,347.20/2,079,520.80 = 389,075.20/x
  3. Step 3: Cross multiply
    1,386,347.20x = 2,079,520.80 × 389,075.20
  4. Step 4: Simplify right side
    1,386,347.20x = 809,089,971,164.16
  5. Step 5: Solve for x
    x = 809,089,971,164.16/1,386,347.20
  6. Step 6: Final answer
    x = 583,612.80

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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.