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Finding the Fourth Proportional to 553,731.40, 830,985.90 and 238,414.60

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Solution

The fourth proportional to 553,731.40, 830,985.90 and 238,414.60 is: 357,789.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,731.40 : 830,985.90 = 238,414.60 : x
  2. Step 2: Convert to fraction form
    553,731.40/830,985.90 = 238,414.60/x
  3. Step 3: Cross multiply
    553,731.40x = 830,985.90 × 238,414.60
  4. Step 4: Simplify right side
    553,731.40x = 198,119,170,954.14
  5. Step 5: Solve for x
    x = 198,119,170,954.14/553,731.40
  6. Step 6: Final answer
    x = 357,789.30

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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.