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Finding the Fourth Proportional to 660,503.90, 911,495.38 and 374,079.34

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Solution

The fourth proportional to 660,503.90, 911,495.38 and 374,079.34 is: 516,229.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,503.90 : 911,495.38 = 374,079.34 : x
  2. Step 2: Convert to fraction form
    660,503.90/911,495.38 = 374,079.34/x
  3. Step 3: Cross multiply
    660,503.90x = 911,495.38 × 374,079.34
  4. Step 4: Simplify right side
    660,503.90x = 340,971,595,457.10
  5. Step 5: Solve for x
    x = 340,971,595,457.10/660,503.90
  6. Step 6: Final answer
    x = 516,229.50

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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.