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Finding the Fourth Proportional to 474,826.40, 712,239.60 and 142,402.40

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Solution

The fourth proportional to 474,826.40, 712,239.60 and 142,402.40 is: 213,603.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    474,826.40 : 712,239.60 = 142,402.40 : x
  2. Step 2: Convert to fraction form
    474,826.40/712,239.60 = 142,402.40/x
  3. Step 3: Cross multiply
    474,826.40x = 712,239.60 × 142,402.40
  4. Step 4: Simplify right side
    474,826.40x = 101,424,628,415.04
  5. Step 5: Solve for x
    x = 101,424,628,415.04/474,826.40
  6. Step 6: Final answer
    x = 213,603.60

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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.