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Finding the Fourth Proportional to 612,064.40, 918,096.60 and 257,478.80

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Solution

The fourth proportional to 612,064.40, 918,096.60 and 257,478.80 is: 386,218.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,064.40 : 918,096.60 = 257,478.80 : x
  2. Step 2: Convert to fraction form
    612,064.40/918,096.60 = 257,478.80/x
  3. Step 3: Cross multiply
    612,064.40x = 918,096.60 × 257,478.80
  4. Step 4: Simplify right side
    612,064.40x = 236,390,410,852.08
  5. Step 5: Solve for x
    x = 236,390,410,852.08/612,064.40
  6. Step 6: Final answer
    x = 386,218.20

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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.