Home / 579,916.80-869,875.20-439,948.80

Finding the Fourth Proportional to 579,916.80, 869,875.20 and 439,948.80

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Solution

The fourth proportional to 579,916.80, 869,875.20 and 439,948.80 is: 659,923.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,916.80 : 869,875.20 = 439,948.80 : x
  2. Step 2: Convert to fraction form
    579,916.80/869,875.20 = 439,948.80/x
  3. Step 3: Cross multiply
    579,916.80x = 869,875.20 × 439,948.80
  4. Step 4: Simplify right side
    579,916.80x = 382,700,550,389.76
  5. Step 5: Solve for x
    x = 382,700,550,389.76/579,916.80
  6. Step 6: Final answer
    x = 659,923.20

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Half scale
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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.