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Finding the Fourth Proportional to 571,893.80, 857,840.70 and 145,428.80

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Solution

The fourth proportional to 571,893.80, 857,840.70 and 145,428.80 is: 218,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,893.80 : 857,840.70 = 145,428.80 : x
  2. Step 2: Convert to fraction form
    571,893.80/857,840.70 = 145,428.80/x
  3. Step 3: Cross multiply
    571,893.80x = 857,840.70 × 145,428.80
  4. Step 4: Simplify right side
    571,893.80x = 124,754,743,592.16
  5. Step 5: Solve for x
    x = 124,754,743,592.16/571,893.80
  6. Step 6: Final answer
    x = 218,143.20

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1.5x scale

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.