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Finding the Fourth Proportional to 644,547.60, 965,669.40 and 311,389.20

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Solution

The fourth proportional to 644,547.60, 965,669.40 and 311,389.20 is: 466,527.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,547.60 : 965,669.40 = 311,389.20 : x
  2. Step 2: Convert to fraction form
    644,547.60/965,669.40 = 311,389.20/x
  3. Step 3: Cross multiply
    644,547.60x = 965,669.40 × 311,389.20
  4. Step 4: Simplify right side
    644,547.60x = 300,699,021,930.48
  5. Step 5: Solve for x
    x = 300,699,021,930.48/644,547.60
  6. Step 6: Final answer
    x = 466,527.25

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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.