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Finding the Fourth Proportional to 387,389.07, 534,560.19 and 358,824.12

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Solution

The fourth proportional to 387,389.07, 534,560.19 and 358,824.12 is: 495,143.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,389.07 : 534,560.19 = 358,824.12 : x
  2. Step 2: Convert to fraction form
    387,389.07/534,560.19 = 358,824.12/x
  3. Step 3: Cross multiply
    387,389.07x = 534,560.19 × 358,824.12
  4. Step 4: Simplify right side
    387,389.07x = 191,813,089,763.78
  5. Step 5: Solve for x
    x = 191,813,089,763.78/387,389.07
  6. Step 6: Final answer
    x = 495,143.27

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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.