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Finding the Fourth Proportional to 630,390,652.40, 945,585,978.60 and 221,446,802.90

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Solution

The fourth proportional to 630,390,652.40, 945,585,978.60 and 221,446,802.90 is: 332,170,204.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,390,652.40 : 945,585,978.60 = 221,446,802.90 : x
  2. Step 2: Convert to fraction form
    630,390,652.40/945,585,978.60 = 221,446,802.90/x
  3. Step 3: Cross multiply
    630,390,652.40x = 945,585,978.60 × 221,446,802.90
  4. Step 4: Simplify right side
    630,390,652.40x = 209,396,991,828,037,824
  5. Step 5: Solve for x
    x = 209,396,991,828,037,824/630,390,652.40
  6. Step 6: Final answer
    x = 332,170,204.35

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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.