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Finding the Fourth Proportional to 710,890.49, 981,028.95 and 388,601.90

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Solution

The fourth proportional to 710,890.49, 981,028.95 and 388,601.90 is: 536,270.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,890.49 : 981,028.95 = 388,601.90 : x
  2. Step 2: Convert to fraction form
    710,890.49/981,028.95 = 388,601.90/x
  3. Step 3: Cross multiply
    710,890.49x = 981,028.95 × 388,601.90
  4. Step 4: Simplify right side
    710,890.49x = 381,229,713,925.01
  5. Step 5: Solve for x
    x = 381,229,713,925.01/710,890.49
  6. Step 6: Final answer
    x = 536,270.66

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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.