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Finding the Fourth Proportional to 570,302.94, 786,206.66 and 388,781.94

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Solution

The fourth proportional to 570,302.94, 786,206.66 and 388,781.94 is: 535,965.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,302.94 : 786,206.66 = 388,781.94 : x
  2. Step 2: Convert to fraction form
    570,302.94/786,206.66 = 388,781.94/x
  3. Step 3: Cross multiply
    570,302.94x = 786,206.66 × 388,781.94
  4. Step 4: Simplify right side
    570,302.94x = 305,662,950,515.72
  5. Step 5: Solve for x
    x = 305,662,950,515.72/570,302.94
  6. Step 6: Final answer
    x = 535,965.94

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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.