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Finding the Fourth Proportional to 619,813.80, 928,554.30 and 319,271.40

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Solution

The fourth proportional to 619,813.80, 928,554.30 and 319,271.40 is: 478,306.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,813.80 : 928,554.30 = 319,271.40 : x
  2. Step 2: Convert to fraction form
    619,813.80/928,554.30 = 319,271.40/x
  3. Step 3: Cross multiply
    619,813.80x = 928,554.30 × 319,271.40
  4. Step 4: Simplify right side
    619,813.80x = 296,460,831,337.02
  5. Step 5: Solve for x
    x = 296,460,831,337.02/619,813.80
  6. Step 6: Final answer
    x = 478,306.28

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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.