Home / 669,985,138.20-1,005,009,200.10-209,938,315.80

Finding the Fourth Proportional to 669,985,138.20, 1,005,009,200.10 and 209,938,315.80

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Solution

The fourth proportional to 669,985,138.20, 1,005,009,200.10 and 209,938,315.80 is: 314,917,341.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,985,138.20 : 1,005,009,200.10 = 209,938,315.80 : x
  2. Step 2: Convert to fraction form
    669,985,138.20/1,005,009,200.10 = 209,938,315.80/x
  3. Step 3: Cross multiply
    669,985,138.20x = 1,005,009,200.10 × 209,938,315.80
  4. Step 4: Simplify right side
    669,985,138.20x = 210,989,938,832,499,200
  5. Step 5: Solve for x
    x = 210,989,938,832,499,200/669,985,138.20
  6. Step 6: Final answer
    x = 314,917,341.90

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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.