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Finding the Fourth Proportional to 389,627.55, 584,419.46 and 105,313.91

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Solution

The fourth proportional to 389,627.55, 584,419.46 and 105,313.91 is: 157,964.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,627.55 : 584,419.46 = 105,313.91 : x
  2. Step 2: Convert to fraction form
    389,627.55/584,419.46 = 105,313.91/x
  3. Step 3: Cross multiply
    389,627.55x = 584,419.46 × 105,313.91
  4. Step 4: Simplify right side
    389,627.55x = 61,547,494,964.02
  5. Step 5: Solve for x
    x = 61,547,494,964.02/389,627.55
  6. Step 6: Final answer
    x = 157,964.95

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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.