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Finding the Fourth Proportional to 579,428.70, 869,143.05 and 549,904.20

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Solution

The fourth proportional to 579,428.70, 869,143.05 and 549,904.20 is: 824,856.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,428.70 : 869,143.05 = 549,904.20 : x
  2. Step 2: Convert to fraction form
    579,428.70/869,143.05 = 549,904.20/x
  3. Step 3: Cross multiply
    579,428.70x = 869,143.05 × 549,904.20
  4. Step 4: Simplify right side
    579,428.70x = 477,945,413,595.81
  5. Step 5: Solve for x
    x = 477,945,413,595.81/579,428.70
  6. Step 6: Final answer
    x = 824,856.30

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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.