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Finding the Fourth Proportional to 717,886.80, 990,681.74 and 395,596.81

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Solution

The fourth proportional to 717,886.80, 990,681.74 and 395,596.81 is: 545,922.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,886.80 : 990,681.74 = 395,596.81 : x
  2. Step 2: Convert to fraction form
    717,886.80/990,681.74 = 395,596.81/x
  3. Step 3: Cross multiply
    717,886.80x = 990,681.74 × 395,596.81
  4. Step 4: Simplify right side
    717,886.80x = 391,910,536,813.11
  5. Step 5: Solve for x
    x = 391,910,536,813.11/717,886.80
  6. Step 6: Final answer
    x = 545,922.47

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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.