Home / 399,021,602.40-598,532,403.60-387,077,666.40

Finding the Fourth Proportional to 399,021,602.40, 598,532,403.60 and 387,077,666.40

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Solution

The fourth proportional to 399,021,602.40, 598,532,403.60 and 387,077,666.40 is: 580,616,499.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,021,602.40 : 598,532,403.60 = 387,077,666.40 : x
  2. Step 2: Convert to fraction form
    399,021,602.40/598,532,403.60 = 387,077,666.40/x
  3. Step 3: Cross multiply
    399,021,602.40x = 598,532,403.60 × 387,077,666.40
  4. Step 4: Simplify right side
    399,021,602.40x = 231,678,526,050,270,944
  5. Step 5: Solve for x
    x = 231,678,526,050,270,944/399,021,602.40
  6. Step 6: Final answer
    x = 580,616,499.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.