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Finding the Fourth Proportional to 257,904.40, 386,856.60 and 169,430.80

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Solution

The fourth proportional to 257,904.40, 386,856.60 and 169,430.80 is: 254,146.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,904.40 : 386,856.60 = 169,430.80 : x
  2. Step 2: Convert to fraction form
    257,904.40/386,856.60 = 169,430.80/x
  3. Step 3: Cross multiply
    257,904.40x = 386,856.60 × 169,430.80
  4. Step 4: Simplify right side
    257,904.40x = 65,545,423,223.28
  5. Step 5: Solve for x
    x = 65,545,423,223.28/257,904.40
  6. Step 6: Final answer
    x = 254,146.20

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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.