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Finding the Fourth Proportional to 813,656.52, 1,220,484.84 and 315,020.52

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Solution

The fourth proportional to 813,656.52, 1,220,484.84 and 315,020.52 is: 472,530.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,656.52 : 1,220,484.84 = 315,020.52 : x
  2. Step 2: Convert to fraction form
    813,656.52/1,220,484.84 = 315,020.52/x
  3. Step 3: Cross multiply
    813,656.52x = 1,220,484.84 × 315,020.52
  4. Step 4: Simplify right side
    813,656.52x = 384,477,768,948.92
  5. Step 5: Solve for x
    x = 384,477,768,948.92/813,656.52
  6. Step 6: Final answer
    x = 472,530.80

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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.