Home / 487,749.09-735,279.42-455,235.69

Finding the Fourth Proportional to 487,749.09, 735,279.42 and 455,235.69

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Solution

The fourth proportional to 487,749.09, 735,279.42 and 455,235.69 is: 686,265.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,749.09 : 735,279.42 = 455,235.69 : x
  2. Step 2: Convert to fraction form
    487,749.09/735,279.42 = 455,235.69/x
  3. Step 3: Cross multiply
    487,749.09x = 735,279.42 × 455,235.69
  4. Step 4: Simplify right side
    487,749.09x = 334,725,434,106.50
  5. Step 5: Solve for x
    x = 334,725,434,106.50/487,749.09
  6. Step 6: Final answer
    x = 686,265.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.