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Finding the Fourth Proportional to 647,840.25, 893,963.51 and 418,407.55

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Solution

The fourth proportional to 647,840.25, 893,963.51 and 418,407.55 is: 577,366.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,840.25 : 893,963.51 = 418,407.55 : x
  2. Step 2: Convert to fraction form
    647,840.25/893,963.51 = 418,407.55/x
  3. Step 3: Cross multiply
    647,840.25x = 893,963.51 × 418,407.55
  4. Step 4: Simplify right side
    647,840.25x = 374,041,077,681.55
  5. Step 5: Solve for x
    x = 374,041,077,681.55/647,840.25
  6. Step 6: Final answer
    x = 577,366.22

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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.