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Finding the Fourth Proportional to 587,415.80, 881,123.70 and 551,986.40

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Solution

The fourth proportional to 587,415.80, 881,123.70 and 551,986.40 is: 827,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,415.80 : 881,123.70 = 551,986.40 : x
  2. Step 2: Convert to fraction form
    587,415.80/881,123.70 = 551,986.40/x
  3. Step 3: Cross multiply
    587,415.80x = 881,123.70 × 551,986.40
  4. Step 4: Simplify right side
    587,415.80x = 486,368,299,117.68
  5. Step 5: Solve for x
    x = 486,368,299,117.68/587,415.80
  6. Step 6: Final answer
    x = 827,979.60

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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.