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Finding the Fourth Proportional to 260,532.84, 390,536.70 and 102,700.20

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Solution

The fourth proportional to 260,532.84, 390,536.70 and 102,700.20 is: 153,946.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,532.84 : 390,536.70 = 102,700.20 : x
  2. Step 2: Convert to fraction form
    260,532.84/390,536.70 = 102,700.20/x
  3. Step 3: Cross multiply
    260,532.84x = 390,536.70 × 102,700.20
  4. Step 4: Simplify right side
    260,532.84x = 40,108,197,197.34
  5. Step 5: Solve for x
    x = 40,108,197,197.34/260,532.84
  6. Step 6: Final answer
    x = 153,946.80

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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.