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Finding the Fourth Proportional to 781,518.15, 1,078,553 and 437,388.57

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Solution

The fourth proportional to 781,518.15, 1,078,553 and 437,388.57 is: 603,628.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,518.15 : 1,078,553 = 437,388.57 : x
  2. Step 2: Convert to fraction form
    781,518.15/1,078,553 = 437,388.57/x
  3. Step 3: Cross multiply
    781,518.15x = 1,078,553 × 437,388.57
  4. Step 4: Simplify right side
    781,518.15x = 471,746,754,339.21
  5. Step 5: Solve for x
    x = 471,746,754,339.21/781,518.15
  6. Step 6: Final answer
    x = 603,628.66

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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.