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Finding the Fourth Proportional to 315,693.77, 435,655.67 and 172,452.78

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Solution

The fourth proportional to 315,693.77, 435,655.67 and 172,452.78 is: 237,983.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,693.77 : 435,655.67 = 172,452.78 : x
  2. Step 2: Convert to fraction form
    315,693.77/435,655.67 = 172,452.78/x
  3. Step 3: Cross multiply
    315,693.77x = 435,655.67 × 172,452.78
  4. Step 4: Simplify right side
    315,693.77x = 75,130,030,552.00
  5. Step 5: Solve for x
    x = 75,130,030,552.00/315,693.77
  6. Step 6: Final answer
    x = 237,983.89

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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.