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Finding the Fourth Proportional to 651,861.60, 978,958.80 and 630,866.40

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Solution

The fourth proportional to 651,861.60, 978,958.80 and 630,866.40 is: 947,428.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,861.60 : 978,958.80 = 630,866.40 : x
  2. Step 2: Convert to fraction form
    651,861.60/978,958.80 = 630,866.40/x
  3. Step 3: Cross multiply
    651,861.60x = 978,958.80 × 630,866.40
  4. Step 4: Simplify right side
    651,861.60x = 617,592,213,904.32
  5. Step 5: Solve for x
    x = 617,592,213,904.32/651,861.60
  6. Step 6: Final answer
    x = 947,428.43

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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.