Home / 531,128.10-732,947.28-289,412.76

Finding the Fourth Proportional to 531,128.10, 732,947.28 and 289,412.76

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Solution

The fourth proportional to 531,128.10, 732,947.28 and 289,412.76 is: 399,384.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,128.10 : 732,947.28 = 289,412.76 : x
  2. Step 2: Convert to fraction form
    531,128.10/732,947.28 = 289,412.76/x
  3. Step 3: Cross multiply
    531,128.10x = 732,947.28 × 289,412.76
  4. Step 4: Simplify right side
    531,128.10x = 212,124,295,239.29
  5. Step 5: Solve for x
    x = 212,124,295,239.29/531,128.10
  6. Step 6: Final answer
    x = 399,384.43

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Double scale
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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.