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Finding the Fourth Proportional to 661,720.40, 992,580.60 and 188,421.20

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Solution

The fourth proportional to 661,720.40, 992,580.60 and 188,421.20 is: 282,631.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,720.40 : 992,580.60 = 188,421.20 : x
  2. Step 2: Convert to fraction form
    661,720.40/992,580.60 = 188,421.20/x
  3. Step 3: Cross multiply
    661,720.40x = 992,580.60 × 188,421.20
  4. Step 4: Simplify right side
    661,720.40x = 187,023,227,748.72
  5. Step 5: Solve for x
    x = 187,023,227,748.72/661,720.40
  6. Step 6: Final answer
    x = 282,631.80

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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.