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Finding the Fourth Proportional to 713,636.53, 984,831.94 and 391,327.40

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Solution

The fourth proportional to 713,636.53, 984,831.94 and 391,327.40 is: 540,039.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,636.53 : 984,831.94 = 391,327.40 : x
  2. Step 2: Convert to fraction form
    713,636.53/984,831.94 = 391,327.40/x
  3. Step 3: Cross multiply
    713,636.53x = 984,831.94 × 391,327.40
  4. Step 4: Simplify right side
    713,636.53x = 385,391,725,468.40
  5. Step 5: Solve for x
    x = 385,391,725,468.40/713,636.53
  6. Step 6: Final answer
    x = 540,039.24

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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.