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Finding the Fourth Proportional to 459,053.80, 688,580.70 and 319,085.80

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Solution

The fourth proportional to 459,053.80, 688,580.70 and 319,085.80 is: 478,628.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,053.80 : 688,580.70 = 319,085.80 : x
  2. Step 2: Convert to fraction form
    459,053.80/688,580.70 = 319,085.80/x
  3. Step 3: Cross multiply
    459,053.80x = 688,580.70 × 319,085.80
  4. Step 4: Simplify right side
    459,053.80x = 219,716,323,524.06
  5. Step 5: Solve for x
    x = 219,716,323,524.06/459,053.80
  6. Step 6: Final answer
    x = 478,628.70

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Similar ratio
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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.