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Finding the Fourth Proportional to 590,415.20, 885,622.80 and 390,960.80

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Solution

The fourth proportional to 590,415.20, 885,622.80 and 390,960.80 is: 586,441.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    590,415.20 : 885,622.80 = 390,960.80 : x
  2. Step 2: Convert to fraction form
    590,415.20/885,622.80 = 390,960.80/x
  3. Step 3: Cross multiply
    590,415.20x = 885,622.80 × 390,960.80
  4. Step 4: Simplify right side
    590,415.20x = 346,243,798,386.24
  5. Step 5: Solve for x
    x = 346,243,798,386.24/590,415.20
  6. Step 6: Final answer
    x = 586,441.20

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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.