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Finding the Fourth Proportional to 453,815.40, 680,723.10 and 390,829.80

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Solution

The fourth proportional to 453,815.40, 680,723.10 and 390,829.80 is: 586,244.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,815.40 : 680,723.10 = 390,829.80 : x
  2. Step 2: Convert to fraction form
    453,815.40/680,723.10 = 390,829.80/x
  3. Step 3: Cross multiply
    453,815.40x = 680,723.10 × 390,829.80
  4. Step 4: Simplify right side
    453,815.40x = 266,046,873,028.38
  5. Step 5: Solve for x
    x = 266,046,873,028.38/453,815.40
  6. Step 6: Final answer
    x = 586,244.70

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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.