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Finding the Fourth Proportional to 468,079.74, 645,364.35 and 390,666.06

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Solution

The fourth proportional to 468,079.74, 645,364.35 and 390,666.06 is: 538,630.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    468,079.74 : 645,364.35 = 390,666.06 : x
  2. Step 2: Convert to fraction form
    468,079.74/645,364.35 = 390,666.06/x
  3. Step 3: Cross multiply
    468,079.74x = 645,364.35 × 390,666.06
  4. Step 4: Simplify right side
    468,079.74x = 252,121,947,878.96
  5. Step 5: Solve for x
    x = 252,121,947,878.96/468,079.74
  6. Step 6: Final answer
    x = 538,630.34

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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.