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Finding the Fourth Proportional to 390,069.70, 583,938.15 and 367,000.90

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Solution

The fourth proportional to 390,069.70, 583,938.15 and 367,000.90 is: 549,403.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,069.70 : 583,938.15 = 367,000.90 : x
  2. Step 2: Convert to fraction form
    390,069.70/583,938.15 = 367,000.90/x
  3. Step 3: Cross multiply
    390,069.70x = 583,938.15 × 367,000.90
  4. Step 4: Simplify right side
    390,069.70x = 214,305,826,594.34
  5. Step 5: Solve for x
    x = 214,305,826,594.34/390,069.70
  6. Step 6: Final answer
    x = 549,403.93

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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.