Home / 900,381,421.38-1,242,656,855.97-518,829,225.03

Finding the Fourth Proportional to 900,381,421.38, 1,242,656,855.97 and 518,829,225.03

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Solution

The fourth proportional to 900,381,421.38, 1,242,656,855.97 and 518,829,225.03 is: 716,059,525.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    900,381,421.38 : 1,242,656,855.97 = 518,829,225.03 : x
  2. Step 2: Convert to fraction form
    900,381,421.38/1,242,656,855.97 = 518,829,225.03/x
  3. Step 3: Cross multiply
    900,381,421.38x = 1,242,656,855.97 × 518,829,225.03
  4. Step 4: Simplify right side
    900,381,421.38x = 644,726,693,561,131,392
  5. Step 5: Solve for x
    x = 644,726,693,561,131,392/900,381,421.38
  6. Step 6: Final answer
    x = 716,059,525.72

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Double scale
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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.