Home / 720,213,635.16-993,899,588.22-390,188,774.28

Finding the Fourth Proportional to 720,213,635.16, 993,899,588.22 and 390,188,774.28

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Solution

The fourth proportional to 720,213,635.16, 993,899,588.22 and 390,188,774.28 is: 538,463,093.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,213,635.16 : 993,899,588.22 = 390,188,774.28 : x
  2. Step 2: Convert to fraction form
    720,213,635.16/993,899,588.22 = 390,188,774.28/x
  3. Step 3: Cross multiply
    720,213,635.16x = 993,899,588.22 × 390,188,774.28
  4. Step 4: Simplify right side
    720,213,635.16x = 387,808,462,084,958,528
  5. Step 5: Solve for x
    x = 387,808,462,084,958,528/720,213,635.16
  6. Step 6: Final answer
    x = 538,463,093.66

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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.