Home / 812,117.40-1,214,720.10-728,482.20

Finding the Fourth Proportional to 812,117.40, 1,214,720.10 and 728,482.20

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Solution

The fourth proportional to 812,117.40, 1,214,720.10 and 728,482.20 is: 1,089,623.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,117.40 : 1,214,720.10 = 728,482.20 : x
  2. Step 2: Convert to fraction form
    812,117.40/1,214,720.10 = 728,482.20/x
  3. Step 3: Cross multiply
    812,117.40x = 1,214,720.10 × 728,482.20
  4. Step 4: Simplify right side
    812,117.40x = 884,901,970,832.22
  5. Step 5: Solve for x
    x = 884,901,970,832.22/812,117.40
  6. Step 6: Final answer
    x = 1,089,623.21

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1.5x scale

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.