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Finding the Fourth Proportional to 315,276.50, 435,080 and 172,036.10

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Solution

The fourth proportional to 315,276.50, 435,080 and 172,036.10 is: 237,408.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,276.50 : 435,080 = 172,036.10 : x
  2. Step 2: Convert to fraction form
    315,276.50/435,080 = 172,036.10/x
  3. Step 3: Cross multiply
    315,276.50x = 435,080 × 172,036.10
  4. Step 4: Simplify right side
    315,276.50x = 74,849,466,388
  5. Step 5: Solve for x
    x = 74,849,466,388/315,276.50
  6. Step 6: Final answer
    x = 237,408.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.