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Finding the Fourth Proportional to 425,638.60, 637,680.30 and 346,323.40

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Solution

The fourth proportional to 425,638.60, 637,680.30 and 346,323.40 is: 518,852.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,638.60 : 637,680.30 = 346,323.40 : x
  2. Step 2: Convert to fraction form
    425,638.60/637,680.30 = 346,323.40/x
  3. Step 3: Cross multiply
    425,638.60x = 637,680.30 × 346,323.40
  4. Step 4: Simplify right side
    425,638.60x = 220,843,609,609.02
  5. Step 5: Solve for x
    x = 220,843,609,609.02/425,638.60
  6. Step 6: Final answer
    x = 518,852.40

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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.