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Finding the Fourth Proportional to 620,820.30, 931,489.65 and 200,225.10

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Solution

The fourth proportional to 620,820.30, 931,489.65 and 200,225.10 is: 300,421.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,820.30 : 931,489.65 = 200,225.10 : x
  2. Step 2: Convert to fraction form
    620,820.30/931,489.65 = 200,225.10/x
  3. Step 3: Cross multiply
    620,820.30x = 931,489.65 × 200,225.10
  4. Step 4: Simplify right side
    620,820.30x = 186,507,608,320.22
  5. Step 5: Solve for x
    x = 186,507,608,320.22/620,820.30
  6. Step 6: Final answer
    x = 300,421.25

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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.