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Finding the Fourth Proportional to 440,511.30, 660,766.95 and 390,647.70

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Solution

The fourth proportional to 440,511.30, 660,766.95 and 390,647.70 is: 585,971.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,511.30 : 660,766.95 = 390,647.70 : x
  2. Step 2: Convert to fraction form
    440,511.30/660,766.95 = 390,647.70/x
  3. Step 3: Cross multiply
    440,511.30x = 660,766.95 × 390,647.70
  4. Step 4: Simplify right side
    440,511.30x = 258,127,089,253.52
  5. Step 5: Solve for x
    x = 258,127,089,253.52/440,511.30
  6. Step 6: Final answer
    x = 585,971.55

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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.