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Finding the Fourth Proportional to 608,021.40, 912,032.10 and 328,085.40

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Solution

The fourth proportional to 608,021.40, 912,032.10 and 328,085.40 is: 492,128.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,021.40 : 912,032.10 = 328,085.40 : x
  2. Step 2: Convert to fraction form
    608,021.40/912,032.10 = 328,085.40/x
  3. Step 3: Cross multiply
    608,021.40x = 912,032.10 × 328,085.40
  4. Step 4: Simplify right side
    608,021.40x = 299,224,416,341.34
  5. Step 5: Solve for x
    x = 299,224,416,341.34/608,021.40
  6. Step 6: Final answer
    x = 492,128.10

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Similar ratio
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1.5x scale

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.