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Finding the Fourth Proportional to 346,639.40, 520,056.30 and 147,055.40

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Solution

The fourth proportional to 346,639.40, 520,056.30 and 147,055.40 is: 220,624.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,639.40 : 520,056.30 = 147,055.40 : x
  2. Step 2: Convert to fraction form
    346,639.40/520,056.30 = 147,055.40/x
  3. Step 3: Cross multiply
    346,639.40x = 520,056.30 × 147,055.40
  4. Step 4: Simplify right side
    346,639.40x = 76,477,087,219.02
  5. Step 5: Solve for x
    x = 76,477,087,219.02/346,639.40
  6. Step 6: Final answer
    x = 220,624.34

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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.