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Finding the Fourth Proportional to 781,329, 1,078,240.50 and 423,633

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Solution

The fourth proportional to 781,329, 1,078,240.50 and 423,633 is: 584,617.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,329 : 1,078,240.50 = 423,633 : x
  2. Step 2: Convert to fraction form
    781,329/1,078,240.50 = 423,633/x
  3. Step 3: Cross multiply
    781,329x = 1,078,240.50 × 423,633
  4. Step 4: Simplify right side
    781,329x = 456,778,257,736.50
  5. Step 5: Solve for x
    x = 456,778,257,736.50/781,329
  6. Step 6: Final answer
    x = 584,617.05

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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.