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Finding the Fourth Proportional to 390,051.90, 547,647.30 and 390,051.90

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Solution

The fourth proportional to 390,051.90, 547,647.30 and 390,051.90 is: 547,647.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,051.90 : 547,647.30 = 390,051.90 : x
  2. Step 2: Convert to fraction form
    390,051.90/547,647.30 = 390,051.90/x
  3. Step 3: Cross multiply
    390,051.90x = 547,647.30 × 390,051.90
  4. Step 4: Simplify right side
    390,051.90x = 213,610,869,894.87
  5. Step 5: Solve for x
    x = 213,610,869,894.87/390,051.90
  6. Step 6: Final answer
    x = 547,647.30

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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.