Home / 812,392.75-1,121,140.50-490,095.93

Finding the Fourth Proportional to 812,392.75, 1,121,140.50 and 490,095.93

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Solution

The fourth proportional to 812,392.75, 1,121,140.50 and 490,095.93 is: 676,355.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,392.75 : 1,121,140.50 = 490,095.93 : x
  2. Step 2: Convert to fraction form
    812,392.75/1,121,140.50 = 490,095.93/x
  3. Step 3: Cross multiply
    812,392.75x = 1,121,140.50 × 490,095.93
  4. Step 4: Simplify right side
    812,392.75x = 549,466,396,008.17
  5. Step 5: Solve for x
    x = 549,466,396,008.17/812,392.75
  6. Step 6: Final answer
    x = 676,355.61

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Double scale
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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.