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Finding the Fourth Proportional to 286,518.94, 429,630.74 and 128,612.04

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Solution

The fourth proportional to 286,518.94, 429,630.74 and 128,612.04 is: 192,851.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,518.94 : 429,630.74 = 128,612.04 : x
  2. Step 2: Convert to fraction form
    286,518.94/429,630.74 = 128,612.04/x
  3. Step 3: Cross multiply
    286,518.94x = 429,630.74 × 128,612.04
  4. Step 4: Simplify right side
    286,518.94x = 55,255,685,918.11
  5. Step 5: Solve for x
    x = 55,255,685,918.11/286,518.94
  6. Step 6: Final answer
    x = 192,851.77

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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.