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Finding the Fourth Proportional to 425,901.60, 638,074.80 and 346,586.40

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Solution

The fourth proportional to 425,901.60, 638,074.80 and 346,586.40 is: 519,246.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,901.60 : 638,074.80 = 346,586.40 : x
  2. Step 2: Convert to fraction form
    425,901.60/638,074.80 = 346,586.40/x
  3. Step 3: Cross multiply
    425,901.60x = 638,074.80 × 346,586.40
  4. Step 4: Simplify right side
    425,901.60x = 221,148,047,862.72
  5. Step 5: Solve for x
    x = 221,148,047,862.72/425,901.60
  6. Step 6: Final answer
    x = 519,246.81

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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.