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Finding the Fourth Proportional to 717,646.26, 990,315.06 and 395,349.30

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Solution

The fourth proportional to 717,646.26, 990,315.06 and 395,349.30 is: 545,561.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,646.26 : 990,315.06 = 395,349.30 : x
  2. Step 2: Convert to fraction form
    717,646.26/990,315.06 = 395,349.30/x
  3. Step 3: Cross multiply
    717,646.26x = 990,315.06 × 395,349.30
  4. Step 4: Simplify right side
    717,646.26x = 391,520,365,750.46
  5. Step 5: Solve for x
    x = 391,520,365,750.46/717,646.26
  6. Step 6: Final answer
    x = 545,561.77

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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.