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Finding the Fourth Proportional to 990,372.40, 1,485,657 and 359,335.42

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Solution

The fourth proportional to 990,372.40, 1,485,657 and 359,335.42 is: 539,038.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,372.40 : 1,485,657 = 359,335.42 : x
  2. Step 2: Convert to fraction form
    990,372.40/1,485,657 = 359,335.42/x
  3. Step 3: Cross multiply
    990,372.40x = 1,485,657 × 359,335.42
  4. Step 4: Simplify right side
    990,372.40x = 533,849,182,070.94
  5. Step 5: Solve for x
    x = 533,849,182,070.94/990,372.40
  6. Step 6: Final answer
    x = 539,038.83

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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.