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Finding the Fourth Proportional to 556,239.16, 767,638.17 and 311,251.42

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Solution

The fourth proportional to 556,239.16, 767,638.17 and 311,251.42 is: 429,542.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,239.16 : 767,638.17 = 311,251.42 : x
  2. Step 2: Convert to fraction form
    556,239.16/767,638.17 = 311,251.42/x
  3. Step 3: Cross multiply
    556,239.16x = 767,638.17 × 311,251.42
  4. Step 4: Simplify right side
    556,239.16x = 238,928,465,064.25
  5. Step 5: Solve for x
    x = 238,928,465,064.25/556,239.16
  6. Step 6: Final answer
    x = 429,542.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.