Home / 638,459.79-881,081.36-351,990.15

Finding the Fourth Proportional to 638,459.79, 881,081.36 and 351,990.15

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Solution

The fourth proportional to 638,459.79, 881,081.36 and 351,990.15 is: 485,750.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,459.79 : 881,081.36 = 351,990.15 : x
  2. Step 2: Convert to fraction form
    638,459.79/881,081.36 = 351,990.15/x
  3. Step 3: Cross multiply
    638,459.79x = 881,081.36 × 351,990.15
  4. Step 4: Simplify right side
    638,459.79x = 310,131,960,068.60
  5. Step 5: Solve for x
    x = 310,131,960,068.60/638,459.79
  6. Step 6: Final answer
    x = 485,750.18

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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.