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Finding the Fourth Proportional to 470,785.80, 706,178.70 and 432,078.60

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Solution

The fourth proportional to 470,785.80, 706,178.70 and 432,078.60 is: 648,117.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,785.80 : 706,178.70 = 432,078.60 : x
  2. Step 2: Convert to fraction form
    470,785.80/706,178.70 = 432,078.60/x
  3. Step 3: Cross multiply
    470,785.80x = 706,178.70 × 432,078.60
  4. Step 4: Simplify right side
    470,785.80x = 305,124,704,045.82
  5. Step 5: Solve for x
    x = 305,124,704,045.82/470,785.80
  6. Step 6: Final answer
    x = 648,117.90

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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.