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Finding the Fourth Proportional to 620,210.20, 930,315.30 and 611,915.80

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Solution

The fourth proportional to 620,210.20, 930,315.30 and 611,915.80 is: 917,873.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,210.20 : 930,315.30 = 611,915.80 : x
  2. Step 2: Convert to fraction form
    620,210.20/930,315.30 = 611,915.80/x
  3. Step 3: Cross multiply
    620,210.20x = 930,315.30 × 611,915.80
  4. Step 4: Simplify right side
    620,210.20x = 569,274,631,051.74
  5. Step 5: Solve for x
    x = 569,274,631,051.74/620,210.20
  6. Step 6: Final answer
    x = 917,873.70

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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.