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Finding the Fourth Proportional to 647,347.12, 893,444.28 and 389,484.70

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Solution

The fourth proportional to 647,347.12, 893,444.28 and 389,484.70 is: 537,552.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,347.12 : 893,444.28 = 389,484.70 : x
  2. Step 2: Convert to fraction form
    647,347.12/893,444.28 = 389,484.70/x
  3. Step 3: Cross multiply
    647,347.12x = 893,444.28 × 389,484.70
  4. Step 4: Simplify right side
    647,347.12x = 347,982,877,362.52
  5. Step 5: Solve for x
    x = 347,982,877,362.52/647,347.12
  6. Step 6: Final answer
    x = 537,552.21

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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.