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Finding the Fourth Proportional to 813,089.79, 1,220,751.87 and 413,998.74

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Solution

The fourth proportional to 813,089.79, 1,220,751.87 and 413,998.74 is: 621,566.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,089.79 : 1,220,751.87 = 413,998.74 : x
  2. Step 2: Convert to fraction form
    813,089.79/1,220,751.87 = 413,998.74/x
  3. Step 3: Cross multiply
    813,089.79x = 1,220,751.87 × 413,998.74
  4. Step 4: Simplify right side
    813,089.79x = 505,389,736,032.64
  5. Step 5: Solve for x
    x = 505,389,736,032.64/813,089.79
  6. Step 6: Final answer
    x = 621,566.94

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Double scale
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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.