Home / 717,582.16-990,258.78-395,284.78

Finding the Fourth Proportional to 717,582.16, 990,258.78 and 395,284.78

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Solution

The fourth proportional to 717,582.16, 990,258.78 and 395,284.78 is: 545,490.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,582.16 : 990,258.78 = 395,284.78 : x
  2. Step 2: Convert to fraction form
    717,582.16/990,258.78 = 395,284.78/x
  3. Step 3: Cross multiply
    717,582.16x = 990,258.78 × 395,284.78
  4. Step 4: Simplify right side
    717,582.16x = 391,434,223,995.37
  5. Step 5: Solve for x
    x = 391,434,223,995.37/717,582.16
  6. Step 6: Final answer
    x = 545,490.46

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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.