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Finding the Fourth Proportional to 506,830.80, 699,427.80 and 280,484.40

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Solution

The fourth proportional to 506,830.80, 699,427.80 and 280,484.40 is: 387,069.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    506,830.80 : 699,427.80 = 280,484.40 : x
  2. Step 2: Convert to fraction form
    506,830.80/699,427.80 = 280,484.40/x
  3. Step 3: Cross multiply
    506,830.80x = 699,427.80 × 280,484.40
  4. Step 4: Simplify right side
    506,830.80x = 196,178,586,826.32
  5. Step 5: Solve for x
    x = 196,178,586,826.32/506,830.80
  6. Step 6: Final answer
    x = 387,069.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.