Home / 385,337.40-578,006.10-318,982.20

Finding the Fourth Proportional to 385,337.40, 578,006.10 and 318,982.20

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Solution

The fourth proportional to 385,337.40, 578,006.10 and 318,982.20 is: 478,473.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,337.40 : 578,006.10 = 318,982.20 : x
  2. Step 2: Convert to fraction form
    385,337.40/578,006.10 = 318,982.20/x
  3. Step 3: Cross multiply
    385,337.40x = 578,006.10 × 318,982.20
  4. Step 4: Simplify right side
    385,337.40x = 184,373,657,391.42
  5. Step 5: Solve for x
    x = 184,373,657,391.42/385,337.40
  6. Step 6: Final answer
    x = 478,473.30

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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.