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Finding the Fourth Proportional to 478,638.45, 660,521.21 and 260,847.23

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Solution

The fourth proportional to 478,638.45, 660,521.21 and 260,847.23 is: 359,969.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,638.45 : 660,521.21 = 260,847.23 : x
  2. Step 2: Convert to fraction form
    478,638.45/660,521.21 = 260,847.23/x
  3. Step 3: Cross multiply
    478,638.45x = 660,521.21 × 260,847.23
  4. Step 4: Simplify right side
    478,638.45x = 172,295,123,377.91
  5. Step 5: Solve for x
    x = 172,295,123,377.91/478,638.45
  6. Step 6: Final answer
    x = 359,969.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.