Home / 687,289,189.98-948,490,314.51-405,043,543.02

Finding the Fourth Proportional to 687,289,189.98, 948,490,314.51 and 405,043,543.02

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Solution

The fourth proportional to 687,289,189.98, 948,490,314.51 and 405,043,543.02 is: 558,978,495.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,289,189.98 : 948,490,314.51 = 405,043,543.02 : x
  2. Step 2: Convert to fraction form
    687,289,189.98/948,490,314.51 = 405,043,543.02/x
  3. Step 3: Cross multiply
    687,289,189.98x = 948,490,314.51 × 405,043,543.02
  4. Step 4: Simplify right side
    687,289,189.98x = 384,179,877,509,284,480
  5. Step 5: Solve for x
    x = 384,179,877,509,284,480/687,289,189.98
  6. Step 6: Final answer
    x = 558,978,495.68

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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.