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Finding the Fourth Proportional to 390,049.70, 583,908.15 and 366,980.90

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Solution

The fourth proportional to 390,049.70, 583,908.15 and 366,980.90 is: 549,373.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,049.70 : 583,908.15 = 366,980.90 : x
  2. Step 2: Convert to fraction form
    390,049.70/583,908.15 = 366,980.90/x
  3. Step 3: Cross multiply
    390,049.70x = 583,908.15 × 366,980.90
  4. Step 4: Simplify right side
    390,049.70x = 214,283,138,404.34
  5. Step 5: Solve for x
    x = 214,283,138,404.34/390,049.70
  6. Step 6: Final answer
    x = 549,373.93

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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.