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Finding the Fourth Proportional to 528,924.60, 793,386.90 and 318,972.60

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Solution

The fourth proportional to 528,924.60, 793,386.90 and 318,972.60 is: 478,458.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,924.60 : 793,386.90 = 318,972.60 : x
  2. Step 2: Convert to fraction form
    528,924.60/793,386.90 = 318,972.60/x
  3. Step 3: Cross multiply
    528,924.60x = 793,386.90 × 318,972.60
  4. Step 4: Simplify right side
    528,924.60x = 253,068,682,298.94
  5. Step 5: Solve for x
    x = 253,068,682,298.94/528,924.60
  6. Step 6: Final answer
    x = 478,458.90

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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.