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Finding the Fourth Proportional to 315,398.70, 435,260.52 and 172,166.40

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Solution

The fourth proportional to 315,398.70, 435,260.52 and 172,166.40 is: 237,595.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,398.70 : 435,260.52 = 172,166.40 : x
  2. Step 2: Convert to fraction form
    315,398.70/435,260.52 = 172,166.40/x
  3. Step 3: Cross multiply
    315,398.70x = 435,260.52 × 172,166.40
  4. Step 4: Simplify right side
    315,398.70x = 74,937,236,790.53
  5. Step 5: Solve for x
    x = 74,937,236,790.53/315,398.70
  6. Step 6: Final answer
    x = 237,595.26

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1.5x scale

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.