Home / 812,668.35-1,121,490.57-490,316.16

Finding the Fourth Proportional to 812,668.35, 1,121,490.57 and 490,316.16

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Solution

The fourth proportional to 812,668.35, 1,121,490.57 and 490,316.16 is: 676,641.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,668.35 : 1,121,490.57 = 490,316.16 : x
  2. Step 2: Convert to fraction form
    812,668.35/1,121,490.57 = 490,316.16/x
  3. Step 3: Cross multiply
    812,668.35x = 1,121,490.57 × 490,316.16
  4. Step 4: Simplify right side
    812,668.35x = 549,884,949,758.61
  5. Step 5: Solve for x
    x = 549,884,949,758.61/812,668.35
  6. Step 6: Final answer
    x = 676,641.28

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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.