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Finding the Fourth Proportional to 553,614.30, 830,421.45 and 354,159.90

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Solution

The fourth proportional to 553,614.30, 830,421.45 and 354,159.90 is: 531,239.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,614.30 : 830,421.45 = 354,159.90 : x
  2. Step 2: Convert to fraction form
    553,614.30/830,421.45 = 354,159.90/x
  3. Step 3: Cross multiply
    553,614.30x = 830,421.45 × 354,159.90
  4. Step 4: Simplify right side
    553,614.30x = 294,101,977,689.86
  5. Step 5: Solve for x
    x = 294,101,977,689.86/553,614.30
  6. Step 6: Final answer
    x = 531,239.85

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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.