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Finding the Fourth Proportional to 720,011.70, 1,080,017.55 and 685,019.70

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Solution

The fourth proportional to 720,011.70, 1,080,017.55 and 685,019.70 is: 1,027,529.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,011.70 : 1,080,017.55 = 685,019.70 : x
  2. Step 2: Convert to fraction form
    720,011.70/1,080,017.55 = 685,019.70/x
  3. Step 3: Cross multiply
    720,011.70x = 1,080,017.55 × 685,019.70
  4. Step 4: Simplify right side
    720,011.70x = 739,833,298,095.74
  5. Step 5: Solve for x
    x = 739,833,298,095.74/720,011.70
  6. Step 6: Final answer
    x = 1,027,529.55

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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.