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Finding the Fourth Proportional to 647,626.19, 893,970.34 and 486,947.84

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Solution

The fourth proportional to 647,626.19, 893,970.34 and 486,947.84 is: 672,173.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,626.19 : 893,970.34 = 486,947.84 : x
  2. Step 2: Convert to fraction form
    647,626.19/893,970.34 = 486,947.84/x
  3. Step 3: Cross multiply
    647,626.19x = 893,970.34 × 486,947.84
  4. Step 4: Simplify right side
    647,626.19x = 435,316,920,399.84
  5. Step 5: Solve for x
    x = 435,316,920,399.84/647,626.19
  6. Step 6: Final answer
    x = 672,173.13

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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.