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Finding the Fourth Proportional to 717,457.55, 990,098.12 and 395,168.81

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Solution

The fourth proportional to 717,457.55, 990,098.12 and 395,168.81 is: 545,336.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,457.55 : 990,098.12 = 395,168.81 : x
  2. Step 2: Convert to fraction form
    717,457.55/990,098.12 = 395,168.81/x
  3. Step 3: Cross multiply
    717,457.55x = 990,098.12 × 395,168.81
  4. Step 4: Simplify right side
    717,457.55x = 391,255,893,887.79
  5. Step 5: Solve for x
    x = 391,255,893,887.79/717,457.55
  6. Step 6: Final answer
    x = 545,336.65

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Double scale
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Similar ratio
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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.