Home / 387,905.40-580,545.90-340,666.20

Finding the Fourth Proportional to 387,905.40, 580,545.90 and 340,666.20

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Solution

The fourth proportional to 387,905.40, 580,545.90 and 340,666.20 is: 509,846.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,905.40 : 580,545.90 = 340,666.20 : x
  2. Step 2: Convert to fraction form
    387,905.40/580,545.90 = 340,666.20/x
  3. Step 3: Cross multiply
    387,905.40x = 580,545.90 × 340,666.20
  4. Step 4: Simplify right side
    387,905.40x = 197,772,365,678.58
  5. Step 5: Solve for x
    x = 197,772,365,678.58/387,905.40
  6. Step 6: Final answer
    x = 509,846.90

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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.