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Finding the Fourth Proportional to 528,855.90, 792,117.45 and 318,126.30

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Solution

The fourth proportional to 528,855.90, 792,117.45 and 318,126.30 is: 476,487.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,855.90 : 792,117.45 = 318,126.30 : x
  2. Step 2: Convert to fraction form
    528,855.90/792,117.45 = 318,126.30/x
  3. Step 3: Cross multiply
    528,855.90x = 792,117.45 × 318,126.30
  4. Step 4: Simplify right side
    528,855.90x = 251,993,393,533.94
  5. Step 5: Solve for x
    x = 251,993,393,533.94/528,855.90
  6. Step 6: Final answer
    x = 476,487.82

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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.