Home / 515,748.06-711,733.50-286,308.72

Finding the Fourth Proportional to 515,748.06, 711,733.50 and 286,308.72

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Solution

The fourth proportional to 515,748.06, 711,733.50 and 286,308.72 is: 395,106.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,748.06 : 711,733.50 = 286,308.72 : x
  2. Step 2: Convert to fraction form
    515,748.06/711,733.50 = 286,308.72/x
  3. Step 3: Cross multiply
    515,748.06x = 711,733.50 × 286,308.72
  4. Step 4: Simplify right side
    515,748.06x = 203,775,507,366.12
  5. Step 5: Solve for x
    x = 203,775,507,366.12/515,748.06
  6. Step 6: Final answer
    x = 395,106.69

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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.