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Finding the Fourth Proportional to 312,085.80, 468,128.70 and 249,877.80

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Solution

The fourth proportional to 312,085.80, 468,128.70 and 249,877.80 is: 374,816.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,085.80 : 468,128.70 = 249,877.80 : x
  2. Step 2: Convert to fraction form
    312,085.80/468,128.70 = 249,877.80/x
  3. Step 3: Cross multiply
    312,085.80x = 468,128.70 × 249,877.80
  4. Step 4: Simplify right side
    312,085.80x = 116,974,969,672.86
  5. Step 5: Solve for x
    x = 116,974,969,672.86/312,085.80
  6. Step 6: Final answer
    x = 374,816.70

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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.