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Finding the Fourth Proportional to 586,939.20, 879,631.20 and 520,065.60

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Solution

The fourth proportional to 586,939.20, 879,631.20 and 520,065.60 is: 779,409.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,939.20 : 879,631.20 = 520,065.60 : x
  2. Step 2: Convert to fraction form
    586,939.20/879,631.20 = 520,065.60/x
  3. Step 3: Cross multiply
    586,939.20x = 879,631.20 × 520,065.60
  4. Step 4: Simplify right side
    586,939.20x = 457,465,927,806.72
  5. Step 5: Solve for x
    x = 457,465,927,806.72/586,939.20
  6. Step 6: Final answer
    x = 779,409.40

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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.