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Finding the Fourth Proportional to 418,390.40, 627,196.80 and 292,030.40

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Solution

The fourth proportional to 418,390.40, 627,196.80 and 292,030.40 is: 437,774.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,390.40 : 627,196.80 = 292,030.40 : x
  2. Step 2: Convert to fraction form
    418,390.40/627,196.80 = 292,030.40/x
  3. Step 3: Cross multiply
    418,390.40x = 627,196.80 × 292,030.40
  4. Step 4: Simplify right side
    418,390.40x = 183,160,532,382.72
  5. Step 5: Solve for x
    x = 183,160,532,382.72/418,390.40
  6. Step 6: Final answer
    x = 437,774.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.