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Finding the Fourth Proportional to 651,856.60, 978,951.30 and 630,861.40

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Solution

The fourth proportional to 651,856.60, 978,951.30 and 630,861.40 is: 947,420.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,856.60 : 978,951.30 = 630,861.40 : x
  2. Step 2: Convert to fraction form
    651,856.60/978,951.30 = 630,861.40/x
  3. Step 3: Cross multiply
    651,856.60x = 978,951.30 × 630,861.40
  4. Step 4: Simplify right side
    651,856.60x = 617,582,587,649.82
  5. Step 5: Solve for x
    x = 617,582,587,649.82/651,856.60
  6. Step 6: Final answer
    x = 947,420.93

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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.