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Finding the Fourth Proportional to 872,355.69, 1,203,672.75 and 509,709.48

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Solution

The fourth proportional to 872,355.69, 1,203,672.75 and 509,709.48 is: 703,295.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,355.69 : 1,203,672.75 = 509,709.48 : x
  2. Step 2: Convert to fraction form
    872,355.69/1,203,672.75 = 509,709.48/x
  3. Step 3: Cross multiply
    872,355.69x = 1,203,672.75 × 509,709.48
  4. Step 4: Simplify right side
    872,355.69x = 613,523,411,492.67
  5. Step 5: Solve for x
    x = 613,523,411,492.67/872,355.69
  6. Step 6: Final answer
    x = 703,295.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.