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Finding the Fourth Proportional to 571,989.63, 857,989.54 and 145,526

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Solution

The fourth proportional to 571,989.63, 857,989.54 and 145,526 is: 218,290.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,989.63 : 857,989.54 = 145,526 : x
  2. Step 2: Convert to fraction form
    571,989.63/857,989.54 = 145,526/x
  3. Step 3: Cross multiply
    571,989.63x = 857,989.54 × 145,526
  4. Step 4: Simplify right side
    571,989.63x = 124,859,785,798.04
  5. Step 5: Solve for x
    x = 124,859,785,798.04/571,989.63
  6. Step 6: Final answer
    x = 218,290.30

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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.