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Finding the Fourth Proportional to 520,095.80, 780,143.70 and 342,948.80

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Solution

The fourth proportional to 520,095.80, 780,143.70 and 342,948.80 is: 514,423.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,095.80 : 780,143.70 = 342,948.80 : x
  2. Step 2: Convert to fraction form
    520,095.80/780,143.70 = 342,948.80/x
  3. Step 3: Cross multiply
    520,095.80x = 780,143.70 × 342,948.80
  4. Step 4: Simplify right side
    520,095.80x = 267,549,345,742.56
  5. Step 5: Solve for x
    x = 267,549,345,742.56/520,095.80
  6. Step 6: Final answer
    x = 514,423.20

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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.