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Finding the Fourth Proportional to 817,715, 1,128,457.40 and 450,234.88

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Solution

The fourth proportional to 817,715, 1,128,457.40 and 450,234.88 is: 621,330.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,715 : 1,128,457.40 = 450,234.88 : x
  2. Step 2: Convert to fraction form
    817,715/1,128,457.40 = 450,234.88/x
  3. Step 3: Cross multiply
    817,715x = 1,128,457.40 × 450,234.88
  4. Step 4: Simplify right side
    817,715x = 508,070,882,074.11
  5. Step 5: Solve for x
    x = 508,070,882,074.11/817,715
  6. Step 6: Final answer
    x = 621,330.03

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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.