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Finding the Fourth Proportional to 615,913.40, 923,870.10 and 580,921.40

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Solution

The fourth proportional to 615,913.40, 923,870.10 and 580,921.40 is: 871,382.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,913.40 : 923,870.10 = 580,921.40 : x
  2. Step 2: Convert to fraction form
    615,913.40/923,870.10 = 580,921.40/x
  3. Step 3: Cross multiply
    615,913.40x = 923,870.10 × 580,921.40
  4. Step 4: Simplify right side
    615,913.40x = 536,695,911,910.14
  5. Step 5: Solve for x
    x = 536,695,911,910.14/615,913.40
  6. Step 6: Final answer
    x = 871,382.10

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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.