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Finding the Fourth Proportional to 713,639.34, 984,835.82 and 391,330.22

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Solution

The fourth proportional to 713,639.34, 984,835.82 and 391,330.22 is: 540,043.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,639.34 : 984,835.82 = 391,330.22 : x
  2. Step 2: Convert to fraction form
    713,639.34/984,835.82 = 391,330.22/x
  3. Step 3: Cross multiply
    713,639.34x = 984,835.82 × 391,330.22
  4. Step 4: Simplify right side
    713,639.34x = 385,396,014,158.63
  5. Step 5: Solve for x
    x = 385,396,014,158.63/713,639.34
  6. Step 6: Final answer
    x = 540,043.12

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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.