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Finding the Fourth Proportional to 390,880.50, 586,323.18 and 110,400.18

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Solution

The fourth proportional to 390,880.50, 586,323.18 and 110,400.18 is: 165,600.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,880.50 : 586,323.18 = 110,400.18 : x
  2. Step 2: Convert to fraction form
    390,880.50/586,323.18 = 110,400.18/x
  3. Step 3: Cross multiply
    390,880.50x = 586,323.18 × 110,400.18
  4. Step 4: Simplify right side
    390,880.50x = 64,730,184,610.17
  5. Step 5: Solve for x
    x = 64,730,184,610.17/390,880.50
  6. Step 6: Final answer
    x = 165,600.96

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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.