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Finding the Fourth Proportional to 615,278.40, 923,047.20 and 260,109.60

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Solution

The fourth proportional to 615,278.40, 923,047.20 and 260,109.60 is: 390,219.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,278.40 : 923,047.20 = 260,109.60 : x
  2. Step 2: Convert to fraction form
    615,278.40/923,047.20 = 260,109.60/x
  3. Step 3: Cross multiply
    615,278.40x = 923,047.20 × 260,109.60
  4. Step 4: Simplify right side
    615,278.40x = 240,093,437,973.12
  5. Step 5: Solve for x
    x = 240,093,437,973.12/615,278.40
  6. Step 6: Final answer
    x = 390,219.19

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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.