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Finding the Fourth Proportional to 265,761,602.40, 398,642,403.60 and 168,401,611.20

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Solution

The fourth proportional to 265,761,602.40, 398,642,403.60 and 168,401,611.20 is: 252,602,416.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,761,602.40 : 398,642,403.60 = 168,401,611.20 : x
  2. Step 2: Convert to fraction form
    265,761,602.40/398,642,403.60 = 168,401,611.20/x
  3. Step 3: Cross multiply
    265,761,602.40x = 398,642,403.60 × 168,401,611.20
  4. Step 4: Simplify right side
    265,761,602.40x = 67,132,023,058,880,680
  5. Step 5: Solve for x
    x = 67,132,023,058,880,680/265,761,602.40
  6. Step 6: Final answer
    x = 252,602,416.80

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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.