Home / 812,391.75-1,121,139.12-490,094.93

Finding the Fourth Proportional to 812,391.75, 1,121,139.12 and 490,094.93

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Solution

The fourth proportional to 812,391.75, 1,121,139.12 and 490,094.93 is: 676,354.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,391.75 : 1,121,139.12 = 490,094.93 : x
  2. Step 2: Convert to fraction form
    812,391.75/1,121,139.12 = 490,094.93/x
  3. Step 3: Cross multiply
    812,391.75x = 1,121,139.12 × 490,094.93
  4. Step 4: Simplify right side
    812,391.75x = 549,464,600,024.16
  5. Step 5: Solve for x
    x = 549,464,600,024.16/812,391.75
  6. Step 6: Final answer
    x = 676,354.23

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1.5x scale

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.