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Finding the Fourth Proportional to 557,365.74, 769,139 and 315,650.05

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Solution

The fourth proportional to 557,365.74, 769,139 and 315,650.05 is: 435,582.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,365.74 : 769,139 = 315,650.05 : x
  2. Step 2: Convert to fraction form
    557,365.74/769,139 = 315,650.05/x
  3. Step 3: Cross multiply
    557,365.74x = 769,139 × 315,650.05
  4. Step 4: Simplify right side
    557,365.74x = 242,778,763,806.95
  5. Step 5: Solve for x
    x = 242,778,763,806.95/557,365.74
  6. Step 6: Final answer
    x = 435,582.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.