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Finding the Fourth Proportional to 528,407.82, 792,602.55 and 212,856.66

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Solution

The fourth proportional to 528,407.82, 792,602.55 and 212,856.66 is: 319,281.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,407.82 : 792,602.55 = 212,856.66 : x
  2. Step 2: Convert to fraction form
    528,407.82/792,602.55 = 212,856.66/x
  3. Step 3: Cross multiply
    528,407.82x = 792,602.55 × 212,856.66
  4. Step 4: Simplify right side
    528,407.82x = 168,710,731,500.48
  5. Step 5: Solve for x
    x = 168,710,731,500.48/528,407.82
  6. Step 6: Final answer
    x = 319,281.29

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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.