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Finding the Fourth Proportional to 390,041.70, 583,896.15 and 366,972.90

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Solution

The fourth proportional to 390,041.70, 583,896.15 and 366,972.90 is: 549,361.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,041.70 : 583,896.15 = 366,972.90 : x
  2. Step 2: Convert to fraction form
    390,041.70/583,896.15 = 366,972.90/x
  3. Step 3: Cross multiply
    390,041.70x = 583,896.15 × 366,972.90
  4. Step 4: Simplify right side
    390,041.70x = 214,274,063,464.34
  5. Step 5: Solve for x
    x = 214,274,063,464.34/390,041.70
  6. Step 6: Final answer
    x = 549,361.94

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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.