Home / 718,429,759.12-991,433,153.64-388,404,810.64

Finding the Fourth Proportional to 718,429,759.12, 991,433,153.64 and 388,404,810.64

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Solution

The fourth proportional to 718,429,759.12, 991,433,153.64 and 388,404,810.64 is: 535,998,685.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,429,759.12 : 991,433,153.64 = 388,404,810.64 : x
  2. Step 2: Convert to fraction form
    718,429,759.12/991,433,153.64 = 388,404,810.64/x
  3. Step 3: Cross multiply
    718,429,759.12x = 991,433,153.64 × 388,404,810.64
  4. Step 4: Simplify right side
    718,429,759.12x = 385,077,406,301,762,176
  5. Step 5: Solve for x
    x = 385,077,406,301,762,176/718,429,759.12
  6. Step 6: Final answer
    x = 535,998,685.21

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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.