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Finding the Fourth Proportional to 316,128.52, 436,263.72 and 172,897.77

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Solution

The fourth proportional to 316,128.52, 436,263.72 and 172,897.77 is: 238,602.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,128.52 : 436,263.72 = 172,897.77 : x
  2. Step 2: Convert to fraction form
    316,128.52/436,263.72 = 172,897.77/x
  3. Step 3: Cross multiply
    316,128.52x = 436,263.72 × 172,897.77
  4. Step 4: Simplify right side
    316,128.52x = 75,429,024,319.90
  5. Step 5: Solve for x
    x = 75,429,024,319.90/316,128.52
  6. Step 6: Final answer
    x = 238,602.40

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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.