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Finding the Fourth Proportional to 612,051.40, 918,077.10 and 257,465.80

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Solution

The fourth proportional to 612,051.40, 918,077.10 and 257,465.80 is: 386,198.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,051.40 : 918,077.10 = 257,465.80 : x
  2. Step 2: Convert to fraction form
    612,051.40/918,077.10 = 257,465.80/x
  3. Step 3: Cross multiply
    612,051.40x = 918,077.10 × 257,465.80
  4. Step 4: Simplify right side
    612,051.40x = 236,373,455,013.18
  5. Step 5: Solve for x
    x = 236,373,455,013.18/612,051.40
  6. Step 6: Final answer
    x = 386,198.70

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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.