Home / 717,478.55-990,165.26-395,188.55

Finding the Fourth Proportional to 717,478.55, 990,165.26 and 395,188.55

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Solution

The fourth proportional to 717,478.55, 990,165.26 and 395,188.55 is: 545,384.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,478.55 : 990,165.26 = 395,188.55 : x
  2. Step 2: Convert to fraction form
    717,478.55/990,165.26 = 395,188.55/x
  3. Step 3: Cross multiply
    717,478.55x = 990,165.26 × 395,188.55
  4. Step 4: Simplify right side
    717,478.55x = 391,301,973,859.24
  5. Step 5: Solve for x
    x = 391,301,973,859.24/717,478.55
  6. Step 6: Final answer
    x = 545,384.91

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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.