Home / 391,955,533.40-540,894,343.72-215,739,761.24

Finding the Fourth Proportional to 391,955,533.40, 540,894,343.72 and 215,739,761.24

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Solution

The fourth proportional to 391,955,533.40, 540,894,343.72 and 215,739,761.24 is: 297,718,507.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,955,533.40 : 540,894,343.72 = 215,739,761.24 : x
  2. Step 2: Convert to fraction form
    391,955,533.40/540,894,343.72 = 215,739,761.24/x
  3. Step 3: Cross multiply
    391,955,533.40x = 540,894,343.72 × 215,739,761.24
  4. Step 4: Simplify right side
    391,955,533.40x = 116,692,416,570,219,312
  5. Step 5: Solve for x
    x = 116,692,416,570,219,312/391,955,533.40
  6. Step 6: Final answer
    x = 297,718,507.91

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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.