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Finding the Fourth Proportional to 673,423.61, 929,483.64 and 387,109.80

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Solution

The fourth proportional to 673,423.61, 929,483.64 and 387,109.80 is: 534,302.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,423.61 : 929,483.64 = 387,109.80 : x
  2. Step 2: Convert to fraction form
    673,423.61/929,483.64 = 387,109.80/x
  3. Step 3: Cross multiply
    673,423.61x = 929,483.64 × 387,109.80
  4. Step 4: Simplify right side
    673,423.61x = 359,812,225,983.67
  5. Step 5: Solve for x
    x = 359,812,225,983.67/673,423.61
  6. Step 6: Final answer
    x = 534,302.96

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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.