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Finding the Fourth Proportional to 661,479.40, 991,124.70 and 380,506.60

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Solution

The fourth proportional to 661,479.40, 991,124.70 and 380,506.60 is: 570,130.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,479.40 : 991,124.70 = 380,506.60 : x
  2. Step 2: Convert to fraction form
    661,479.40/991,124.70 = 380,506.60/x
  3. Step 3: Cross multiply
    661,479.40x = 991,124.70 × 380,506.60
  4. Step 4: Simplify right side
    661,479.40x = 377,129,489,773.02
  5. Step 5: Solve for x
    x = 377,129,489,773.02/661,479.40
  6. Step 6: Final answer
    x = 570,130.36

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1.5x scale

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.