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Finding the Fourth Proportional to 315,543.69, 435,460.73 and 172,314.63

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Solution

The fourth proportional to 315,543.69, 435,460.73 and 172,314.63 is: 237,799.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,543.69 : 435,460.73 = 172,314.63 : x
  2. Step 2: Convert to fraction form
    315,543.69/435,460.73 = 172,314.63/x
  3. Step 3: Cross multiply
    315,543.69x = 435,460.73 × 172,314.63
  4. Step 4: Simplify right side
    315,543.69x = 75,036,253,707.91
  5. Step 5: Solve for x
    x = 75,036,253,707.91/315,543.69
  6. Step 6: Final answer
    x = 237,799.89

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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.