Home / 989,164.20-1,484,135.10-390,023.40

Finding the Fourth Proportional to 989,164.20, 1,484,135.10 and 390,023.40

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Solution

The fourth proportional to 989,164.20, 1,484,135.10 and 390,023.40 is: 585,188.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,164.20 : 1,484,135.10 = 390,023.40 : x
  2. Step 2: Convert to fraction form
    989,164.20/1,484,135.10 = 390,023.40/x
  3. Step 3: Cross multiply
    989,164.20x = 1,484,135.10 × 390,023.40
  4. Step 4: Simplify right side
    989,164.20x = 578,847,417,761.34
  5. Step 5: Solve for x
    x = 578,847,417,761.34/989,164.20
  6. Step 6: Final answer
    x = 585,188.40

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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.