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Finding the Fourth Proportional to 315,276.40, 435,077.80 and 172,038.80

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Solution

The fourth proportional to 315,276.40, 435,077.80 and 172,038.80 is: 237,411.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,276.40 : 435,077.80 = 172,038.80 : x
  2. Step 2: Convert to fraction form
    315,276.40/435,077.80 = 172,038.80/x
  3. Step 3: Cross multiply
    315,276.40x = 435,077.80 × 172,038.80
  4. Step 4: Simplify right side
    315,276.40x = 74,850,262,618.64
  5. Step 5: Solve for x
    x = 74,850,262,618.64/315,276.40
  6. Step 6: Final answer
    x = 237,411.56

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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.