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Finding the Fourth Proportional to 315,459.69, 435,332.16 and 172,219.74

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Solution

The fourth proportional to 315,459.69, 435,332.16 and 172,219.74 is: 237,662.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,459.69 : 435,332.16 = 172,219.74 : x
  2. Step 2: Convert to fraction form
    315,459.69/435,332.16 = 172,219.74/x
  3. Step 3: Cross multiply
    315,459.69x = 435,332.16 × 172,219.74
  4. Step 4: Simplify right side
    315,459.69x = 74,972,791,408.84
  5. Step 5: Solve for x
    x = 74,972,791,408.84/315,459.69
  6. Step 6: Final answer
    x = 237,662.03

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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.