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Finding the Fourth Proportional to 559,752.21, 772,478.87 and 318,075.75

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Solution

The fourth proportional to 559,752.21, 772,478.87 and 318,075.75 is: 438,956.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,752.21 : 772,478.87 = 318,075.75 : x
  2. Step 2: Convert to fraction form
    559,752.21/772,478.87 = 318,075.75/x
  3. Step 3: Cross multiply
    559,752.21x = 772,478.87 × 318,075.75
  4. Step 4: Simplify right side
    559,752.21x = 245,706,794,344.02
  5. Step 5: Solve for x
    x = 245,706,794,344.02/559,752.21
  6. Step 6: Final answer
    x = 438,956.36

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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.