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Finding the Fourth Proportional to 713,838.02, 985,124.04 and 391,561.70

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Solution

The fourth proportional to 713,838.02, 985,124.04 and 391,561.70 is: 540,370.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,838.02 : 985,124.04 = 391,561.70 : x
  2. Step 2: Convert to fraction form
    713,838.02/985,124.04 = 391,561.70/x
  3. Step 3: Cross multiply
    713,838.02x = 985,124.04 × 391,561.70
  4. Step 4: Simplify right side
    713,838.02x = 385,736,843,813.27
  5. Step 5: Solve for x
    x = 385,736,843,813.27/713,838.02
  6. Step 6: Final answer
    x = 540,370.27

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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.