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Finding the Fourth Proportional to 215,010.40, 320,701.46 and 186,707.89

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Solution

The fourth proportional to 215,010.40, 320,701.46 and 186,707.89 is: 278,486.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,010.40 : 320,701.46 = 186,707.89 : x
  2. Step 2: Convert to fraction form
    215,010.40/320,701.46 = 186,707.89/x
  3. Step 3: Cross multiply
    215,010.40x = 320,701.46 × 186,707.89
  4. Step 4: Simplify right side
    215,010.40x = 59,877,492,916.52
  5. Step 5: Solve for x
    x = 59,877,492,916.52/215,010.40
  6. Step 6: Final answer
    x = 278,486.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.