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Finding the Fourth Proportional to 315,370.08, 435,207.54 and 172,128.87

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Solution

The fourth proportional to 315,370.08, 435,207.54 and 172,128.87 is: 237,536.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,370.08 : 435,207.54 = 172,128.87 : x
  2. Step 2: Convert to fraction form
    315,370.08/435,207.54 = 172,128.87/x
  3. Step 3: Cross multiply
    315,370.08x = 435,207.54 × 172,128.87
  4. Step 4: Simplify right side
    315,370.08x = 74,911,782,075.68
  5. Step 5: Solve for x
    x = 74,911,782,075.68/315,370.08
  6. Step 6: Final answer
    x = 237,536.11

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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.