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Finding the Fourth Proportional to 717,967.13, 990,620.63 and 407,800.71

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Solution

The fourth proportional to 717,967.13, 990,620.63 and 407,800.71 is: 562,666.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,967.13 : 990,620.63 = 407,800.71 : x
  2. Step 2: Convert to fraction form
    717,967.13/990,620.63 = 407,800.71/x
  3. Step 3: Cross multiply
    717,967.13x = 990,620.63 × 407,800.71
  4. Step 4: Simplify right side
    717,967.13x = 403,975,796,254.65
  5. Step 5: Solve for x
    x = 403,975,796,254.65/717,967.13
  6. Step 6: Final answer
    x = 562,666.14

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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.