Home / 812,678.85-1,121,505.06-490,326.66

Finding the Fourth Proportional to 812,678.85, 1,121,505.06 and 490,326.66

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Solution

The fourth proportional to 812,678.85, 1,121,505.06 and 490,326.66 is: 676,655.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,678.85 : 1,121,505.06 = 490,326.66 : x
  2. Step 2: Convert to fraction form
    812,678.85/1,121,505.06 = 490,326.66/x
  3. Step 3: Cross multiply
    812,678.85x = 1,121,505.06 × 490,326.66
  4. Step 4: Simplify right side
    812,678.85x = 549,903,830,242.90
  5. Step 5: Solve for x
    x = 549,903,830,242.90/812,678.85
  6. Step 6: Final answer
    x = 676,655.77

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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.