Home / 419,920,306.40-629,880,459.60-400,788,430.40

Finding the Fourth Proportional to 419,920,306.40, 629,880,459.60 and 400,788,430.40

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Solution

The fourth proportional to 419,920,306.40, 629,880,459.60 and 400,788,430.40 is: 601,182,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,920,306.40 : 629,880,459.60 = 400,788,430.40 : x
  2. Step 2: Convert to fraction form
    419,920,306.40/629,880,459.60 = 400,788,430.40/x
  3. Step 3: Cross multiply
    419,920,306.40x = 629,880,459.60 × 400,788,430.40
  4. Step 4: Simplify right side
    419,920,306.40x = 252,448,800,742,714,592
  5. Step 5: Solve for x
    x = 252,448,800,742,714,592/419,920,306.40
  6. Step 6: Final answer
    x = 601,182,645.60

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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.