Home / 420,724,385.70-631,097,404.20-199,343,779.80

Finding the Fourth Proportional to 420,724,385.70, 631,097,404.20 and 199,343,779.80

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Solution

The fourth proportional to 420,724,385.70, 631,097,404.20 and 199,343,779.80 is: 299,020,799.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,724,385.70 : 631,097,404.20 = 199,343,779.80 : x
  2. Step 2: Convert to fraction form
    420,724,385.70/631,097,404.20 = 199,343,779.80/x
  3. Step 3: Cross multiply
    420,724,385.70x = 631,097,404.20 × 199,343,779.80
  4. Step 4: Simplify right side
    420,724,385.70x = 125,805,341,975,196,416
  5. Step 5: Solve for x
    x = 125,805,341,975,196,416/420,724,385.70
  6. Step 6: Final answer
    x = 299,020,799.01

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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.