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Finding the Fourth Proportional to 713,746.80, 984,975.44 and 391,459.20

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Solution

The fourth proportional to 713,746.80, 984,975.44 and 391,459.20 is: 540,216.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,746.80 : 984,975.44 = 391,459.20 : x
  2. Step 2: Convert to fraction form
    713,746.80/984,975.44 = 391,459.20/x
  3. Step 3: Cross multiply
    713,746.80x = 984,975.44 × 391,459.20
  4. Step 4: Simplify right side
    713,746.80x = 385,577,701,994.45
  5. Step 5: Solve for x
    x = 385,577,701,994.45/713,746.80
  6. Step 6: Final answer
    x = 540,216.37

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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.