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Finding the Fourth Proportional to 439,807.92, 607,000.20 and 278,678.06

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Solution

The fourth proportional to 439,807.92, 607,000.20 and 278,678.06 is: 384,617.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,807.92 : 607,000.20 = 278,678.06 : x
  2. Step 2: Convert to fraction form
    439,807.92/607,000.20 = 278,678.06/x
  3. Step 3: Cross multiply
    439,807.92x = 607,000.20 × 278,678.06
  4. Step 4: Simplify right side
    439,807.92x = 169,157,638,155.61
  5. Step 5: Solve for x
    x = 169,157,638,155.61/439,807.92
  6. Step 6: Final answer
    x = 384,617.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.