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Finding the Fourth Proportional to 610,411.80, 915,617.70 and 520,210.20

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Solution

The fourth proportional to 610,411.80, 915,617.70 and 520,210.20 is: 780,315.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,411.80 : 915,617.70 = 520,210.20 : x
  2. Step 2: Convert to fraction form
    610,411.80/915,617.70 = 520,210.20/x
  3. Step 3: Cross multiply
    610,411.80x = 915,617.70 × 520,210.20
  4. Step 4: Simplify right side
    610,411.80x = 476,313,666,840.54
  5. Step 5: Solve for x
    x = 476,313,666,840.54/610,411.80
  6. Step 6: Final answer
    x = 780,315.30

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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.