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Finding the Fourth Proportional to 413,426.40, 620,139.60 and 360,938.40

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Solution

The fourth proportional to 413,426.40, 620,139.60 and 360,938.40 is: 541,407.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,426.40 : 620,139.60 = 360,938.40 : x
  2. Step 2: Convert to fraction form
    413,426.40/620,139.60 = 360,938.40/x
  3. Step 3: Cross multiply
    413,426.40x = 620,139.60 × 360,938.40
  4. Step 4: Simplify right side
    413,426.40x = 223,832,195,000.64
  5. Step 5: Solve for x
    x = 223,832,195,000.64/413,426.40
  6. Step 6: Final answer
    x = 541,407.60

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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.