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Finding the Fourth Proportional to 656,415.30, 982,654.65 and 390,038.70

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Solution

The fourth proportional to 656,415.30, 982,654.65 and 390,038.70 is: 583,888.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,415.30 : 982,654.65 = 390,038.70 : x
  2. Step 2: Convert to fraction form
    656,415.30/982,654.65 = 390,038.70/x
  3. Step 3: Cross multiply
    656,415.30x = 982,654.65 × 390,038.70
  4. Step 4: Simplify right side
    656,415.30x = 383,273,342,234.96
  5. Step 5: Solve for x
    x = 383,273,342,234.96/656,415.30
  6. Step 6: Final answer
    x = 583,888.50

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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.