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Finding the Fourth Proportional to 718,990.71, 992,566.73 and 447,146.18

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Solution

The fourth proportional to 718,990.71, 992,566.73 and 447,146.18 is: 617,285.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,990.71 : 992,566.73 = 447,146.18 : x
  2. Step 2: Convert to fraction form
    718,990.71/992,566.73 = 447,146.18/x
  3. Step 3: Cross multiply
    718,990.71x = 992,566.73 × 447,146.18
  4. Step 4: Simplify right side
    718,990.71x = 443,822,421,714.59
  5. Step 5: Solve for x
    x = 443,822,421,714.59/718,990.71
  6. Step 6: Final answer
    x = 617,285.34

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Double scale
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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.