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Finding the Fourth Proportional to 553,066.18, 763,304.09 and 311,395.86

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Solution

The fourth proportional to 553,066.18, 763,304.09 and 311,395.86 is: 429,767.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,066.18 : 763,304.09 = 311,395.86 : x
  2. Step 2: Convert to fraction form
    553,066.18/763,304.09 = 311,395.86/x
  3. Step 3: Cross multiply
    553,066.18x = 763,304.09 × 311,395.86
  4. Step 4: Simplify right side
    553,066.18x = 237,689,731,990.09
  5. Step 5: Solve for x
    x = 237,689,731,990.09/553,066.18
  6. Step 6: Final answer
    x = 429,767.25

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1.5x scale

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.