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Finding the Fourth Proportional to 389,428.83, 584,147.93 and 136,715.67

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Solution

The fourth proportional to 389,428.83, 584,147.93 and 136,715.67 is: 205,075.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,428.83 : 584,147.93 = 136,715.67 : x
  2. Step 2: Convert to fraction form
    389,428.83/584,147.93 = 136,715.67/x
  3. Step 3: Cross multiply
    389,428.83x = 584,147.93 × 136,715.67
  4. Step 4: Simplify right side
    389,428.83x = 79,862,174,945.48
  5. Step 5: Solve for x
    x = 79,862,174,945.48/389,428.83
  6. Step 6: Final answer
    x = 205,075.15

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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.