Home / 812,948.30-1,121,853.48-490,671.98

Finding the Fourth Proportional to 812,948.30, 1,121,853.48 and 490,671.98

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Solution

The fourth proportional to 812,948.30, 1,121,853.48 and 490,671.98 is: 677,118.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,948.30 : 1,121,853.48 = 490,671.98 : x
  2. Step 2: Convert to fraction form
    812,948.30/1,121,853.48 = 490,671.98/x
  3. Step 3: Cross multiply
    812,948.30x = 1,121,853.48 × 490,671.98
  4. Step 4: Simplify right side
    812,948.30x = 550,462,068,301.49
  5. Step 5: Solve for x
    x = 550,462,068,301.49/812,948.30
  6. Step 6: Final answer
    x = 677,118.17

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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.