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Finding the Fourth Proportional to 315,276.60, 435,073.50 and 172,038.36

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Solution

The fourth proportional to 315,276.60, 435,073.50 and 172,038.36 is: 237,408.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,276.60 : 435,073.50 = 172,038.36 : x
  2. Step 2: Convert to fraction form
    315,276.60/435,073.50 = 172,038.36/x
  3. Step 3: Cross multiply
    315,276.60x = 435,073.50 × 172,038.36
  4. Step 4: Simplify right side
    315,276.60x = 74,849,331,419.46
  5. Step 5: Solve for x
    x = 74,849,331,419.46/315,276.60
  6. Step 6: Final answer
    x = 237,408.46

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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.