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Finding the Fourth Proportional to 578,006.60, 867,009.90 and 365,430.20

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Solution

The fourth proportional to 578,006.60, 867,009.90 and 365,430.20 is: 548,145.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,006.60 : 867,009.90 = 365,430.20 : x
  2. Step 2: Convert to fraction form
    578,006.60/867,009.90 = 365,430.20/x
  3. Step 3: Cross multiply
    578,006.60x = 867,009.90 × 365,430.20
  4. Step 4: Simplify right side
    578,006.60x = 316,831,601,158.98
  5. Step 5: Solve for x
    x = 316,831,601,158.98/578,006.60
  6. Step 6: Final answer
    x = 548,145.30

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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.