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Finding the Fourth Proportional to 578,139.40, 866,042.70 and 400,846.60

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Solution

The fourth proportional to 578,139.40, 866,042.70 and 400,846.60 is: 600,461.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,139.40 : 866,042.70 = 400,846.60 : x
  2. Step 2: Convert to fraction form
    578,139.40/866,042.70 = 400,846.60/x
  3. Step 3: Cross multiply
    578,139.40x = 866,042.70 × 400,846.60
  4. Step 4: Simplify right side
    578,139.40x = 347,150,271,749.82
  5. Step 5: Solve for x
    x = 347,150,271,749.82/578,139.40
  6. Step 6: Final answer
    x = 600,461.19

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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.