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Finding the Fourth Proportional to 713,509.04, 984,635.10 and 391,218.59

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Solution

The fourth proportional to 713,509.04, 984,635.10 and 391,218.59 is: 539,877.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,509.04 : 984,635.10 = 391,218.59 : x
  2. Step 2: Convert to fraction form
    713,509.04/984,635.10 = 391,218.59/x
  3. Step 3: Cross multiply
    713,509.04x = 984,635.10 × 391,218.59
  4. Step 4: Simplify right side
    713,509.04x = 385,207,555,486.51
  5. Step 5: Solve for x
    x = 385,207,555,486.51/713,509.04
  6. Step 6: Final answer
    x = 539,877.61

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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.