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Finding the Fourth Proportional to 739,681.72, 1,020,750.80 and 412,999.76

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Solution

The fourth proportional to 739,681.72, 1,020,750.80 and 412,999.76 is: 569,934.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,681.72 : 1,020,750.80 = 412,999.76 : x
  2. Step 2: Convert to fraction form
    739,681.72/1,020,750.80 = 412,999.76/x
  3. Step 3: Cross multiply
    739,681.72x = 1,020,750.80 × 412,999.76
  4. Step 4: Simplify right side
    739,681.72x = 421,569,835,419.81
  5. Step 5: Solve for x
    x = 421,569,835,419.81/739,681.72
  6. Step 6: Final answer
    x = 569,934.10

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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.