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Finding the Fourth Proportional to 456,900.60, 630,909.90 and 287,189.40

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Solution

The fourth proportional to 456,900.60, 630,909.90 and 287,189.40 is: 396,564.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,900.60 : 630,909.90 = 287,189.40 : x
  2. Step 2: Convert to fraction form
    456,900.60/630,909.90 = 287,189.40/x
  3. Step 3: Cross multiply
    456,900.60x = 630,909.90 × 287,189.40
  4. Step 4: Simplify right side
    456,900.60x = 181,190,635,635.06
  5. Step 5: Solve for x
    x = 181,190,635,635.06/456,900.60
  6. Step 6: Final answer
    x = 396,564.67

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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.