Home / 420,977,404.80-630,509,513.40-266,009,209.20

Finding the Fourth Proportional to 420,977,404.80, 630,509,513.40 and 266,009,209.20

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Solution

The fourth proportional to 420,977,404.80, 630,509,513.40 and 266,009,209.20 is: 398,409,356.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,977,404.80 : 630,509,513.40 = 266,009,209.20 : x
  2. Step 2: Convert to fraction form
    420,977,404.80/630,509,513.40 = 266,009,209.20/x
  3. Step 3: Cross multiply
    420,977,404.80x = 630,509,513.40 × 266,009,209.20
  4. Step 4: Simplify right side
    420,977,404.80x = 167,721,337,052,610,784
  5. Step 5: Solve for x
    x = 167,721,337,052,610,784/420,977,404.80
  6. Step 6: Final answer
    x = 398,409,356.75

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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.