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Finding the Fourth Proportional to 875.01, 1,312.93 and 388.00

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Solution

The fourth proportional to 875.01, 1,312.93 and 388.00 is: 582.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.01 : 1,312.93 = 388.00 : x
  2. Step 2: Convert to fraction form
    875.01/1,312.93 = 388.00/x
  3. Step 3: Cross multiply
    875.01x = 1,312.93 × 388.00
  4. Step 4: Simplify right side
    875.01x = 509,410.28
  5. Step 5: Solve for x
    x = 509,410.28/875.01
  6. Step 6: Final answer
    x = 582.18

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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.