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Finding the Fourth Proportional to 572,503.80, 790,079.92 and 317,855

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Solution

The fourth proportional to 572,503.80, 790,079.92 and 317,855 is: 438,653.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,503.80 : 790,079.92 = 317,855 : x
  2. Step 2: Convert to fraction form
    572,503.80/790,079.92 = 317,855/x
  3. Step 3: Cross multiply
    572,503.80x = 790,079.92 × 317,855
  4. Step 4: Simplify right side
    572,503.80x = 251,130,852,971.60
  5. Step 5: Solve for x
    x = 251,130,852,971.60/572,503.80
  6. Step 6: Final answer
    x = 438,653.60

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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.