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Finding the Fourth Proportional to 651,855.60, 978,949.80 and 630,860.40

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Solution

The fourth proportional to 651,855.60, 978,949.80 and 630,860.40 is: 947,419.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,855.60 : 978,949.80 = 630,860.40 : x
  2. Step 2: Convert to fraction form
    651,855.60/978,949.80 = 630,860.40/x
  3. Step 3: Cross multiply
    651,855.60x = 978,949.80 × 630,860.40
  4. Step 4: Simplify right side
    651,855.60x = 617,580,662,407.92
  5. Step 5: Solve for x
    x = 617,580,662,407.92/651,855.60
  6. Step 6: Final answer
    x = 947,419.43

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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.