Home / 1,421,728.40-2,129,482.20-859,782.80

Finding the Fourth Proportional to 1,421,728.40, 2,129,482.20 and 859,782.80

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Solution

The fourth proportional to 1,421,728.40, 2,129,482.20 and 859,782.80 is: 1,287,793.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421,728.40 : 2,129,482.20 = 859,782.80 : x
  2. Step 2: Convert to fraction form
    1,421,728.40/2,129,482.20 = 859,782.80/x
  3. Step 3: Cross multiply
    1,421,728.40x = 2,129,482.20 × 859,782.80
  4. Step 4: Simplify right side
    1,421,728.40x = 1,830,892,168,466.16
  5. Step 5: Solve for x
    x = 1,830,892,168,466.16/1,421,728.40
  6. Step 6: Final answer
    x = 1,287,793.20

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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.