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Finding the Fourth Proportional to 573,140.48, 790,928.16 and 318,486.32

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Solution

The fourth proportional to 573,140.48, 790,928.16 and 318,486.32 is: 439,507.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,140.48 : 790,928.16 = 318,486.32 : x
  2. Step 2: Convert to fraction form
    573,140.48/790,928.16 = 318,486.32/x
  3. Step 3: Cross multiply
    573,140.48x = 790,928.16 × 318,486.32
  4. Step 4: Simplify right side
    573,140.48x = 251,899,799,062.77
  5. Step 5: Solve for x
    x = 251,899,799,062.77/573,140.48
  6. Step 6: Final answer
    x = 439,507.95

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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.