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Finding the Fourth Proportional to 900,398.52, 1,242,503.60 and 492,420.96

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Solution

The fourth proportional to 900,398.52, 1,242,503.60 and 492,420.96 is: 679,515.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    900,398.52 : 1,242,503.60 = 492,420.96 : x
  2. Step 2: Convert to fraction form
    900,398.52/1,242,503.60 = 492,420.96/x
  3. Step 3: Cross multiply
    900,398.52x = 1,242,503.60 × 492,420.96
  4. Step 4: Simplify right side
    900,398.52x = 611,834,813,053.35
  5. Step 5: Solve for x
    x = 611,834,813,053.35/900,398.52
  6. Step 6: Final answer
    x = 679,515.57

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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.