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Finding the Fourth Proportional to 586,315.20, 879,472.80 and 513,998.40

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Solution

The fourth proportional to 586,315.20, 879,472.80 and 513,998.40 is: 770,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,315.20 : 879,472.80 = 513,998.40 : x
  2. Step 2: Convert to fraction form
    586,315.20/879,472.80 = 513,998.40/x
  3. Step 3: Cross multiply
    586,315.20x = 879,472.80 × 513,998.40
  4. Step 4: Simplify right side
    586,315.20x = 452,047,612,043.52
  5. Step 5: Solve for x
    x = 452,047,612,043.52/586,315.20
  6. Step 6: Final answer
    x = 770,997.60

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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.