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Finding the Fourth Proportional to 707,389.18, 976,209.54 and 385,108.54

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Solution

The fourth proportional to 707,389.18, 976,209.54 and 385,108.54 is: 531,456.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,389.18 : 976,209.54 = 385,108.54 : x
  2. Step 2: Convert to fraction form
    707,389.18/976,209.54 = 385,108.54/x
  3. Step 3: Cross multiply
    707,389.18x = 976,209.54 × 385,108.54
  4. Step 4: Simplify right side
    707,389.18x = 375,946,630,683.47
  5. Step 5: Solve for x
    x = 375,946,630,683.47/707,389.18
  6. Step 6: Final answer
    x = 531,456.57

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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.