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Finding the Fourth Proportional to 556,464, 767,920.32 and 318,000

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Solution

The fourth proportional to 556,464, 767,920.32 and 318,000 is: 438,840.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,464 : 767,920.32 = 318,000 : x
  2. Step 2: Convert to fraction form
    556,464/767,920.32 = 318,000/x
  3. Step 3: Cross multiply
    556,464x = 767,920.32 × 318,000
  4. Step 4: Simplify right side
    556,464x = 244,198,661,760.00
  5. Step 5: Solve for x
    x = 244,198,661,760.00/556,464
  6. Step 6: Final answer
    x = 438,840.00

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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.