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Finding the Fourth Proportional to 528,417.12, 792,987.12 and 212,898.72

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Solution

The fourth proportional to 528,417.12, 792,987.12 and 212,898.72 is: 319,493.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,417.12 : 792,987.12 = 212,898.72 : x
  2. Step 2: Convert to fraction form
    528,417.12/792,987.12 = 212,898.72/x
  3. Step 3: Cross multiply
    528,417.12x = 792,987.12 × 212,898.72
  4. Step 4: Simplify right side
    528,417.12x = 168,825,942,824.49
  5. Step 5: Solve for x
    x = 168,825,942,824.49/528,417.12
  6. Step 6: Final answer
    x = 319,493.70

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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.