Home / 812,681.88-1,121,509.23-490,329.66

Finding the Fourth Proportional to 812,681.88, 1,121,509.23 and 490,329.66

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Solution

The fourth proportional to 812,681.88, 1,121,509.23 and 490,329.66 is: 676,659.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,681.88 : 1,121,509.23 = 490,329.66 : x
  2. Step 2: Convert to fraction form
    812,681.88/1,121,509.23 = 490,329.66/x
  3. Step 3: Cross multiply
    812,681.88x = 1,121,509.23 × 490,329.66
  4. Step 4: Simplify right side
    812,681.88x = 549,909,239,432.76
  5. Step 5: Solve for x
    x = 549,909,239,432.76/812,681.88
  6. Step 6: Final answer
    x = 676,659.90

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Double scale
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Similar ratio
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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.