Home / 821,856.12-1,233,111.20-316,281.36

Finding the Fourth Proportional to 821,856.12, 1,233,111.20 and 316,281.36

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Solution

The fourth proportional to 821,856.12, 1,233,111.20 and 316,281.36 is: 474,547.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,856.12 : 1,233,111.20 = 316,281.36 : x
  2. Step 2: Convert to fraction form
    821,856.12/1,233,111.20 = 316,281.36/x
  3. Step 3: Cross multiply
    821,856.12x = 1,233,111.20 × 316,281.36
  4. Step 4: Simplify right side
    821,856.12x = 390,010,087,367.23
  5. Step 5: Solve for x
    x = 390,010,087,367.23/821,856.12
  6. Step 6: Final answer
    x = 474,547.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.