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Finding the Fourth Proportional to 717,991.83, 990,828.72 and 395,701.92

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Solution

The fourth proportional to 717,991.83, 990,828.72 and 395,701.92 is: 546,068.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,991.83 : 990,828.72 = 395,701.92 : x
  2. Step 2: Convert to fraction form
    717,991.83/990,828.72 = 395,701.92/x
  3. Step 3: Cross multiply
    717,991.83x = 990,828.72 × 395,701.92
  4. Step 4: Simplify right side
    717,991.83x = 392,072,826,895.14
  5. Step 5: Solve for x
    x = 392,072,826,895.14/717,991.83
  6. Step 6: Final answer
    x = 546,068.65

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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.