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Finding the Fourth Proportional to 657,484.80, 907,315.20 and 389,299.20

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Solution

The fourth proportional to 657,484.80, 907,315.20 and 389,299.20 is: 537,224.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,484.80 : 907,315.20 = 389,299.20 : x
  2. Step 2: Convert to fraction form
    657,484.80/907,315.20 = 389,299.20/x
  3. Step 3: Cross multiply
    657,484.80x = 907,315.20 × 389,299.20
  4. Step 4: Simplify right side
    657,484.80x = 353,217,081,507.84
  5. Step 5: Solve for x
    x = 353,217,081,507.84/657,484.80
  6. Step 6: Final answer
    x = 537,224.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.