Home / 812,457.64-1,121,189.55-468,290.77

Finding the Fourth Proportional to 812,457.64, 1,121,189.55 and 468,290.77

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Solution

The fourth proportional to 812,457.64, 1,121,189.55 and 468,290.77 is: 646,240.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,457.64 : 1,121,189.55 = 468,290.77 : x
  2. Step 2: Convert to fraction form
    812,457.64/1,121,189.55 = 468,290.77/x
  3. Step 3: Cross multiply
    812,457.64x = 1,121,189.55 × 468,290.77
  4. Step 4: Simplify right side
    812,457.64x = 525,042,713,126.39
  5. Step 5: Solve for x
    x = 525,042,713,126.39/812,457.64
  6. Step 6: Final answer
    x = 646,240.11

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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.