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Finding the Fourth Proportional to 357,722.40, 537,620.40 and 312,103.20

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Solution

The fourth proportional to 357,722.40, 537,620.40 and 312,103.20 is: 469,059.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,722.40 : 537,620.40 = 312,103.20 : x
  2. Step 2: Convert to fraction form
    357,722.40/537,620.40 = 312,103.20/x
  3. Step 3: Cross multiply
    357,722.40x = 537,620.40 × 312,103.20
  4. Step 4: Simplify right side
    357,722.40x = 167,793,047,225.28
  5. Step 5: Solve for x
    x = 167,793,047,225.28/357,722.40
  6. Step 6: Final answer
    x = 469,059.38

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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.