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Finding the Fourth Proportional to 357,730.40, 537,632.40 and 312,111.20

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Solution

The fourth proportional to 357,730.40, 537,632.40 and 312,111.20 is: 469,071.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,730.40 : 537,632.40 = 312,111.20 : x
  2. Step 2: Convert to fraction form
    357,730.40/537,632.40 = 312,111.20/x
  3. Step 3: Cross multiply
    357,730.40x = 537,632.40 × 312,111.20
  4. Step 4: Simplify right side
    357,730.40x = 167,801,093,522.88
  5. Step 5: Solve for x
    x = 167,801,093,522.88/357,730.40
  6. Step 6: Final answer
    x = 469,071.38

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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.