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Finding the Fourth Proportional to 572,720.63, 790,354.46 and 318,095.51

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Solution

The fourth proportional to 572,720.63, 790,354.46 and 318,095.51 is: 438,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,720.63 : 790,354.46 = 318,095.51 : x
  2. Step 2: Convert to fraction form
    572,720.63/790,354.46 = 318,095.51/x
  3. Step 3: Cross multiply
    572,720.63x = 790,354.46 × 318,095.51
  4. Step 4: Simplify right side
    572,720.63x = 251,408,201,877.94
  5. Step 5: Solve for x
    x = 251,408,201,877.94/572,720.63
  6. Step 6: Final answer
    x = 438,971.80

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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.