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Finding the Fourth Proportional to 718,041.15, 990,902.82 and 395,752.07

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Solution

The fourth proportional to 718,041.15, 990,902.82 and 395,752.07 is: 546,141.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,041.15 : 990,902.82 = 395,752.07 : x
  2. Step 2: Convert to fraction form
    718,041.15/990,902.82 = 395,752.07/x
  3. Step 3: Cross multiply
    718,041.15x = 990,902.82 × 395,752.07
  4. Step 4: Simplify right side
    718,041.15x = 392,151,846,145.17
  5. Step 5: Solve for x
    x = 392,151,846,145.17/718,041.15
  6. Step 6: Final answer
    x = 546,141.19

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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.