Home / 813,254.34-1,121,658.12-490,628.10

Finding the Fourth Proportional to 813,254.34, 1,121,658.12 and 490,628.10

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Solution

The fourth proportional to 813,254.34, 1,121,658.12 and 490,628.10 is: 676,684.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,254.34 : 1,121,658.12 = 490,628.10 : x
  2. Step 2: Convert to fraction form
    813,254.34/1,121,658.12 = 490,628.10/x
  3. Step 3: Cross multiply
    813,254.34x = 1,121,658.12 × 490,628.10
  4. Step 4: Simplify right side
    813,254.34x = 550,316,992,265.17
  5. Step 5: Solve for x
    x = 550,316,992,265.17/813,254.34
  6. Step 6: Final answer
    x = 676,684.97

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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.