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Finding the Fourth Proportional to 391,421.60, 586,257.60 and 321,437.60

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Solution

The fourth proportional to 391,421.60, 586,257.60 and 321,437.60 is: 481,438.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,421.60 : 586,257.60 = 321,437.60 : x
  2. Step 2: Convert to fraction form
    391,421.60/586,257.60 = 321,437.60/x
  3. Step 3: Cross multiply
    391,421.60x = 586,257.60 × 321,437.60
  4. Step 4: Simplify right side
    391,421.60x = 188,445,235,925.76
  5. Step 5: Solve for x
    x = 188,445,235,925.76/391,421.60
  6. Step 6: Final answer
    x = 481,438.01

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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.