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Finding the Fourth Proportional to 357,898.60, 536,454.26 and 147,421.72

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Solution

The fourth proportional to 357,898.60, 536,454.26 and 147,421.72 is: 220,970.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,898.60 : 536,454.26 = 147,421.72 : x
  2. Step 2: Convert to fraction form
    357,898.60/536,454.26 = 147,421.72/x
  3. Step 3: Cross multiply
    357,898.60x = 536,454.26 × 147,421.72
  4. Step 4: Simplify right side
    357,898.60x = 79,085,009,710.53
  5. Step 5: Solve for x
    x = 79,085,009,710.53/357,898.60
  6. Step 6: Final answer
    x = 220,970.44

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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.