Home / 385,430.20-578,145.30-208,283.20

Finding the Fourth Proportional to 385,430.20, 578,145.30 and 208,283.20

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Solution

The fourth proportional to 385,430.20, 578,145.30 and 208,283.20 is: 312,424.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,430.20 : 578,145.30 = 208,283.20 : x
  2. Step 2: Convert to fraction form
    385,430.20/578,145.30 = 208,283.20/x
  3. Step 3: Cross multiply
    385,430.20x = 578,145.30 × 208,283.20
  4. Step 4: Simplify right side
    385,430.20x = 120,417,953,148.96
  5. Step 5: Solve for x
    x = 120,417,953,148.96/385,430.20
  6. Step 6: Final answer
    x = 312,424.80

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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.