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Finding the Fourth Proportional to 470,761.50, 706,142.25 and 138,337.50

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Solution

The fourth proportional to 470,761.50, 706,142.25 and 138,337.50 is: 207,506.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,761.50 : 706,142.25 = 138,337.50 : x
  2. Step 2: Convert to fraction form
    470,761.50/706,142.25 = 138,337.50/x
  3. Step 3: Cross multiply
    470,761.50x = 706,142.25 × 138,337.50
  4. Step 4: Simplify right side
    470,761.50x = 97,685,953,509.38
  5. Step 5: Solve for x
    x = 97,685,953,509.38/470,761.50
  6. Step 6: Final answer
    x = 207,506.25

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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.