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Finding the Fourth Proportional to 528,212.32, 792,309.76 and 212,661.12

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Solution

The fourth proportional to 528,212.32, 792,309.76 and 212,661.12 is: 318,988.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,212.32 : 792,309.76 = 212,661.12 : x
  2. Step 2: Convert to fraction form
    528,212.32/792,309.76 = 212,661.12/x
  3. Step 3: Cross multiply
    528,212.32x = 792,309.76 × 212,661.12
  4. Step 4: Simplify right side
    528,212.32x = 168,493,480,948.53
  5. Step 5: Solve for x
    x = 168,493,480,948.53/528,212.32
  6. Step 6: Final answer
    x = 318,988.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.