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Finding the Fourth Proportional to 315,453.40, 435,332.28 and 172,219.48

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Solution

The fourth proportional to 315,453.40, 435,332.28 and 172,219.48 is: 237,666.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,453.40 : 435,332.28 = 172,219.48 : x
  2. Step 2: Convert to fraction form
    315,453.40/435,332.28 = 172,219.48/x
  3. Step 3: Cross multiply
    315,453.40x = 435,332.28 × 172,219.48
  4. Step 4: Simplify right side
    315,453.40x = 74,972,698,888.81
  5. Step 5: Solve for x
    x = 74,972,698,888.81/315,453.40
  6. Step 6: Final answer
    x = 237,666.48

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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.