Home / 645,399.12-967,784.76-389,495.40

Finding the Fourth Proportional to 645,399.12, 967,784.76 and 389,495.40

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Solution

The fourth proportional to 645,399.12, 967,784.76 and 389,495.40 is: 584,053.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,399.12 : 967,784.76 = 389,495.40 : x
  2. Step 2: Convert to fraction form
    645,399.12/967,784.76 = 389,495.40/x
  3. Step 3: Cross multiply
    645,399.12x = 967,784.76 × 389,495.40
  4. Step 4: Simplify right side
    645,399.12x = 376,947,712,210.10
  5. Step 5: Solve for x
    x = 376,947,712,210.10/645,399.12
  6. Step 6: Final answer
    x = 584,053.65

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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.