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Finding the Fourth Proportional to 343,281.20, 514,921.80 and 156,657.20

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Solution

The fourth proportional to 343,281.20, 514,921.80 and 156,657.20 is: 234,985.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,281.20 : 514,921.80 = 156,657.20 : x
  2. Step 2: Convert to fraction form
    343,281.20/514,921.80 = 156,657.20/x
  3. Step 3: Cross multiply
    343,281.20x = 514,921.80 × 156,657.20
  4. Step 4: Simplify right side
    343,281.20x = 80,666,207,406.96
  5. Step 5: Solve for x
    x = 80,666,207,406.96/343,281.20
  6. Step 6: Final answer
    x = 234,985.80

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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.