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Finding the Fourth Proportional to 640,969.80, 961,454.70 and 558,025.80

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Solution

The fourth proportional to 640,969.80, 961,454.70 and 558,025.80 is: 837,038.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,969.80 : 961,454.70 = 558,025.80 : x
  2. Step 2: Convert to fraction form
    640,969.80/961,454.70 = 558,025.80/x
  3. Step 3: Cross multiply
    640,969.80x = 961,454.70 × 558,025.80
  4. Step 4: Simplify right side
    640,969.80x = 536,516,528,131.26
  5. Step 5: Solve for x
    x = 536,516,528,131.26/640,969.80
  6. Step 6: Final answer
    x = 837,038.70

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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.