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Finding the Fourth Proportional to 630,067.17, 869,509.79 and 385,091.58

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Solution

The fourth proportional to 630,067.17, 869,509.79 and 385,091.58 is: 531,436.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,067.17 : 869,509.79 = 385,091.58 : x
  2. Step 2: Convert to fraction form
    630,067.17/869,509.79 = 385,091.58/x
  3. Step 3: Cross multiply
    630,067.17x = 869,509.79 × 385,091.58
  4. Step 4: Simplify right side
    630,067.17x = 334,840,896,931.11
  5. Step 5: Solve for x
    x = 334,840,896,931.11/630,067.17
  6. Step 6: Final answer
    x = 531,436.83

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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.