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Finding the Fourth Proportional to 557,128.38, 768,837.15 and 302,479.59

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Solution

The fourth proportional to 557,128.38, 768,837.15 and 302,479.59 is: 417,421.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,128.38 : 768,837.15 = 302,479.59 : x
  2. Step 2: Convert to fraction form
    557,128.38/768,837.15 = 302,479.59/x
  3. Step 3: Cross multiply
    557,128.38x = 768,837.15 × 302,479.59
  4. Step 4: Simplify right side
    557,128.38x = 232,557,545,908.77
  5. Step 5: Solve for x
    x = 232,557,545,908.77/557,128.38
  6. Step 6: Final answer
    x = 417,421.83

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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.