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Finding the Fourth Proportional to 642,904.40, 964,356.60 and 169,637.60

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Solution

The fourth proportional to 642,904.40, 964,356.60 and 169,637.60 is: 254,456.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,904.40 : 964,356.60 = 169,637.60 : x
  2. Step 2: Convert to fraction form
    642,904.40/964,356.60 = 169,637.60/x
  3. Step 3: Cross multiply
    642,904.40x = 964,356.60 × 169,637.60
  4. Step 4: Simplify right side
    642,904.40x = 163,591,139,168.16
  5. Step 5: Solve for x
    x = 163,591,139,168.16/642,904.40
  6. Step 6: Final answer
    x = 254,456.40

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Double scale
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Similar ratio
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1.5x scale

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.