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Finding the Fourth Proportional to 875.09, 1,312.88 and 464.16

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Solution

The fourth proportional to 875.09, 1,312.88 and 464.16 is: 696.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.09 : 1,312.88 = 464.16 : x
  2. Step 2: Convert to fraction form
    875.09/1,312.88 = 464.16/x
  3. Step 3: Cross multiply
    875.09x = 1,312.88 × 464.16
  4. Step 4: Simplify right side
    875.09x = 609,384.06
  5. Step 5: Solve for x
    x = 609,384.06/875.09
  6. Step 6: Final answer
    x = 696.37

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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.