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Finding the Fourth Proportional to 528,856.90, 792,118.95 and 318,127.30

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Solution

The fourth proportional to 528,856.90, 792,118.95 and 318,127.30 is: 476,489.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,856.90 : 792,118.95 = 318,127.30 : x
  2. Step 2: Convert to fraction form
    528,856.90/792,118.95 = 318,127.30/x
  3. Step 3: Cross multiply
    528,856.90x = 792,118.95 × 318,127.30
  4. Step 4: Simplify right side
    528,856.90x = 251,994,662,842.34
  5. Step 5: Solve for x
    x = 251,994,662,842.34/528,856.90
  6. Step 6: Final answer
    x = 476,489.32

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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.