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Finding the Fourth Proportional to 571,890.30, 857,835.45 and 145,425.30

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Solution

The fourth proportional to 571,890.30, 857,835.45 and 145,425.30 is: 218,137.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,890.30 : 857,835.45 = 145,425.30 : x
  2. Step 2: Convert to fraction form
    571,890.30/857,835.45 = 145,425.30/x
  3. Step 3: Cross multiply
    571,890.30x = 857,835.45 × 145,425.30
  4. Step 4: Simplify right side
    571,890.30x = 124,750,977,666.89
  5. Step 5: Solve for x
    x = 124,750,977,666.89/571,890.30
  6. Step 6: Final answer
    x = 218,137.95

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Double scale
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Similar ratio
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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.