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Finding the Fourth Proportional to 879,798.60, 1,214,136.22 and 477,390.60

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Solution

The fourth proportional to 879,798.60, 1,214,136.22 and 477,390.60 is: 658,806.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,798.60 : 1,214,136.22 = 477,390.60 : x
  2. Step 2: Convert to fraction form
    879,798.60/1,214,136.22 = 477,390.60/x
  3. Step 3: Cross multiply
    879,798.60x = 1,214,136.22 × 477,390.60
  4. Step 4: Simplify right side
    879,798.60x = 579,617,218,547.53
  5. Step 5: Solve for x
    x = 579,617,218,547.53/879,798.60
  6. Step 6: Final answer
    x = 658,806.71

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.