Home / 812,386.13-1,121,131.37-490,089.31

Finding the Fourth Proportional to 812,386.13, 1,121,131.37 and 490,089.31

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Solution

The fourth proportional to 812,386.13, 1,121,131.37 and 490,089.31 is: 676,346.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,386.13 : 1,121,131.37 = 490,089.31 : x
  2. Step 2: Convert to fraction form
    812,386.13/1,121,131.37 = 490,089.31/x
  3. Step 3: Cross multiply
    812,386.13x = 1,121,131.37 × 490,089.31
  4. Step 4: Simplify right side
    812,386.13x = 549,454,494,289.38
  5. Step 5: Solve for x
    x = 549,454,494,289.38/812,386.13
  6. Step 6: Final answer
    x = 676,346.48

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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.