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Finding the Fourth Proportional to 508,763.70, 763,145.55 and 243,043.20

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Solution

The fourth proportional to 508,763.70, 763,145.55 and 243,043.20 is: 364,564.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,763.70 : 763,145.55 = 243,043.20 : x
  2. Step 2: Convert to fraction form
    508,763.70/763,145.55 = 243,043.20/x
  3. Step 3: Cross multiply
    508,763.70x = 763,145.55 × 243,043.20
  4. Step 4: Simplify right side
    508,763.70x = 185,477,336,537.76
  5. Step 5: Solve for x
    x = 185,477,336,537.76/508,763.70
  6. Step 6: Final answer
    x = 364,564.80

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Similar ratio
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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.