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Finding the Fourth Proportional to 615,703.60, 921,805.80 and 545,719.60

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Solution

The fourth proportional to 615,703.60, 921,805.80 and 545,719.60 is: 817,028.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,703.60 : 921,805.80 = 545,719.60 : x
  2. Step 2: Convert to fraction form
    615,703.60/921,805.80 = 545,719.60/x
  3. Step 3: Cross multiply
    615,703.60x = 921,805.80 × 545,719.60
  4. Step 4: Simplify right side
    615,703.60x = 503,047,492,453.68
  5. Step 5: Solve for x
    x = 503,047,492,453.68/615,703.60
  6. Step 6: Final answer
    x = 817,028.67

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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.