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Finding the Fourth Proportional to 551,337.12, 760,646.16 and 312,734.88

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Solution

The fourth proportional to 551,337.12, 760,646.16 and 312,734.88 is: 431,461.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,337.12 : 760,646.16 = 312,734.88 : x
  2. Step 2: Convert to fraction form
    551,337.12/760,646.16 = 312,734.88/x
  3. Step 3: Cross multiply
    551,337.12x = 760,646.16 × 312,734.88
  4. Step 4: Simplify right side
    551,337.12x = 237,880,585,570.06
  5. Step 5: Solve for x
    x = 237,880,585,570.06/551,337.12
  6. Step 6: Final answer
    x = 431,461.22

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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.