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Finding the Fourth Proportional to 611,774.10, 917,661.15 and 572,408.10

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Solution

The fourth proportional to 611,774.10, 917,661.15 and 572,408.10 is: 858,612.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,774.10 : 917,661.15 = 572,408.10 : x
  2. Step 2: Convert to fraction form
    611,774.10/917,661.15 = 572,408.10/x
  3. Step 3: Cross multiply
    611,774.10x = 917,661.15 × 572,408.10
  4. Step 4: Simplify right side
    611,774.10x = 525,276,675,315.32
  5. Step 5: Solve for x
    x = 525,276,675,315.32/611,774.10
  6. Step 6: Final answer
    x = 858,612.15

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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.