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Finding the Fourth Proportional to 557,056.16, 768,656.40 and 318,546.08

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Solution

The fourth proportional to 557,056.16, 768,656.40 and 318,546.08 is: 439,547.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,056.16 : 768,656.40 = 318,546.08 : x
  2. Step 2: Convert to fraction form
    557,056.16/768,656.40 = 318,546.08/x
  3. Step 3: Cross multiply
    557,056.16x = 768,656.40 × 318,546.08
  4. Step 4: Simplify right side
    557,056.16x = 244,852,483,086.91
  5. Step 5: Solve for x
    x = 244,852,483,086.91/557,056.16
  6. Step 6: Final answer
    x = 439,547.21

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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.