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Finding the Fourth Proportional to 389,709.80, 584,564.70 and 152,973.80

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Solution

The fourth proportional to 389,709.80, 584,564.70 and 152,973.80 is: 229,460.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,709.80 : 584,564.70 = 152,973.80 : x
  2. Step 2: Convert to fraction form
    389,709.80/584,564.70 = 152,973.80/x
  3. Step 3: Cross multiply
    389,709.80x = 584,564.70 × 152,973.80
  4. Step 4: Simplify right side
    389,709.80x = 89,423,083,504.86
  5. Step 5: Solve for x
    x = 89,423,083,504.86/389,709.80
  6. Step 6: Final answer
    x = 229,460.70

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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.