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Finding the Fourth Proportional to 692,408.47, 955,521.31 and 386,482.20

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Solution

The fourth proportional to 692,408.47, 955,521.31 and 386,482.20 is: 533,344.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,408.47 : 955,521.31 = 386,482.20 : x
  2. Step 2: Convert to fraction form
    692,408.47/955,521.31 = 386,482.20/x
  3. Step 3: Cross multiply
    692,408.47x = 955,521.31 × 386,482.20
  4. Step 4: Simplify right side
    692,408.47x = 369,291,978,035.68
  5. Step 5: Solve for x
    x = 369,291,978,035.68/692,408.47
  6. Step 6: Final answer
    x = 533,344.11

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1.5x scale

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.