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Finding the Fourth Proportional to 459,000.70, 688,501.05 and 143,457.10

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Solution

The fourth proportional to 459,000.70, 688,501.05 and 143,457.10 is: 215,185.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,000.70 : 688,501.05 = 143,457.10 : x
  2. Step 2: Convert to fraction form
    459,000.70/688,501.05 = 143,457.10/x
  3. Step 3: Cross multiply
    459,000.70x = 688,501.05 × 143,457.10
  4. Step 4: Simplify right side
    459,000.70x = 98,770,363,979.96
  5. Step 5: Solve for x
    x = 98,770,363,979.96/459,000.70
  6. Step 6: Final answer
    x = 215,185.65

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Double scale
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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.