Home / 429,312,022.80-643,968,034.20-399,078,934.80

Finding the Fourth Proportional to 429,312,022.80, 643,968,034.20 and 399,078,934.80

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Solution

The fourth proportional to 429,312,022.80, 643,968,034.20 and 399,078,934.80 is: 598,618,402.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,312,022.80 : 643,968,034.20 = 399,078,934.80 : x
  2. Step 2: Convert to fraction form
    429,312,022.80/643,968,034.20 = 399,078,934.80/x
  3. Step 3: Cross multiply
    429,312,022.80x = 643,968,034.20 × 399,078,934.80
  4. Step 4: Simplify right side
    429,312,022.80x = 256,994,077,133,785,984
  5. Step 5: Solve for x
    x = 256,994,077,133,785,984/429,312,022.80
  6. Step 6: Final answer
    x = 598,618,402.20

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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.