Home / 717,417.36-990,080.90-395,127.38

Finding the Fourth Proportional to 717,417.36, 990,080.90 and 395,127.38

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Solution

The fourth proportional to 717,417.36, 990,080.90 and 395,127.38 is: 545,300.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,417.36 : 990,080.90 = 395,127.38 : x
  2. Step 2: Convert to fraction form
    717,417.36/990,080.90 = 395,127.38/x
  3. Step 3: Cross multiply
    717,417.36x = 990,080.90 × 395,127.38
  4. Step 4: Simplify right side
    717,417.36x = 391,208,065,079.00
  5. Step 5: Solve for x
    x = 391,208,065,079.00/717,417.36
  6. Step 6: Final answer
    x = 545,300.53

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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.