Home / 438,620,739.80-657,931,109.70-369,745,986.20

Finding the Fourth Proportional to 438,620,739.80, 657,931,109.70 and 369,745,986.20

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Solution

The fourth proportional to 438,620,739.80, 657,931,109.70 and 369,745,986.20 is: 554,618,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,620,739.80 : 657,931,109.70 = 369,745,986.20 : x
  2. Step 2: Convert to fraction form
    438,620,739.80/657,931,109.70 = 369,745,986.20/x
  3. Step 3: Cross multiply
    438,620,739.80x = 657,931,109.70 × 369,745,986.20
  4. Step 4: Simplify right side
    438,620,739.80x = 243,267,387,007,686,880
  5. Step 5: Solve for x
    x = 243,267,387,007,686,880/438,620,739.80
  6. Step 6: Final answer
    x = 554,618,979.30

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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.