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Finding the Fourth Proportional to 390,069.90, 547,672.50 and 390,069.90

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Solution

The fourth proportional to 390,069.90, 547,672.50 and 390,069.90 is: 547,672.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,069.90 : 547,672.50 = 390,069.90 : x
  2. Step 2: Convert to fraction form
    390,069.90/547,672.50 = 390,069.90/x
  3. Step 3: Cross multiply
    390,069.90x = 547,672.50 × 390,069.90
  4. Step 4: Simplify right side
    390,069.90x = 213,630,557,307.75
  5. Step 5: Solve for x
    x = 213,630,557,307.75/390,069.90
  6. Step 6: Final answer
    x = 547,672.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.